healthcheck correct connect result

Based on user reports, a `connect` test can observer a non-"Can't
connect" error message.

Because this passes other tests, like innodb_initialized might
succeeded.

The final test -z "$connect_s" is also true, leaving the user
with an incorrect test result.

Maybe the healthcheck cnf hasn't been created yet?

Either way, ruggardise the final test to ensure a healthy connect
test occured.

Closes MariaDB#610

10.11-ubi/healthcheck.sh

@@ -365,8 +365,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

10.11/healthcheck.sh

@@ -365,8 +365,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

10.5/healthcheck.sh

@@ -365,8 +365,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

10.6-ubi/healthcheck.sh

@@ -365,8 +365,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

10.6/healthcheck.sh

@@ -365,8 +365,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

11.1/healthcheck.sh

@@ -365,8 +365,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

11.2/healthcheck.sh

@@ -365,8 +365,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

11.4-ubi/healthcheck.sh

@@ -367,8 +367,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

11.4/healthcheck.sh

@@ -367,8 +367,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

11.5/healthcheck.sh

@@ -367,8 +367,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

healthcheck.sh

@@ -367,8 +367,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

main-ubi/healthcheck.sh

@@ -367,8 +367,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?

main/healthcheck.sh

@@ -367,8 +367,8 @@ while [ $# -gt 0 ]; do
 	fi
 	shift
 done
-if [ -z "$connect_s" ]; then
-	# we didn't do a connnect test, so the current success status is suspicious
+if [ "$connect_s" != "0" ]; then
+	# we didn't pass a connnect test, so the current success status is suspicious
 	# return what connect thinks.
 	connect
 	exit $?