Revert "dbus_config: Remove dbus configuration file"

This reverts commit 103be9f.

No D-Bus policy file is installed which causes persistence-administrator
to fail during startup since it ends up calling a persitence-client-object
function that wants to own the name org.genivi.persistence.admin. Owning
names is denied by default on the system bus.

Since it is persistence-common-object that takes the name
org.genivi.persistence.admin in src/pers_ipc_dbus.c:persIpcPASLoopThread(),
the configuration probably belongs in this repository.

It looks like persistence-client-library has never installed
org.genivi.persistence.admin.conf itself in its build system. It was done
for a while in meta-ivi which must have been the source of the conflict
mentioned in the reverted commit. Installed in
GENIVI/meta-ivi@7318681d851e3e3ee22a but later removed in
GENIVI/meta-ivi@9d5a45e473fbb3a29f5e with the comment "it should be done
by PCO".

The reverted commit was sent in pull request #3 with no reasoning as to why
it should be added by persistent-client-library instead of
persistence-common-object. Later pull request #5 first adds it but then
removes it again in a later commit. Unsure why. Reasoning in comment about
the missing D-Bus config file seemed correct.

Signed-off-by: Martin Ejdestig <[email protected]>

dbus_config/org.genivi.persistence.admin.conf

@@ -0,0 +1,16 @@
+<!DOCTYPE busconfig PUBLIC
+ "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
+ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
+<busconfig>
+
+	<!-- Only root can own the service -->
+	<policy user="root">
+		<allow own="org.genivi.persistence.admin"/>
+		<allow send_destination="org.genivi.persistence.admin"/>
+		<allow send_interface="org.genivi.persistence.admin"/>
+	</policy>
+	<policy context="default">
+    	<allow send_destination="org.genivi.persistence.admin"/>
+    	<allow send_interface="org.genivi.persistence.admin"/>
+  </policy>
+</busconfig>

src/Makefile.am

@@ -114,6 +114,8 @@ libpers_common_la_LIBADD += \
                              $(RAWDB_LIBS)
 endif
 
+dbuspolicy_DATA = ../dbus_config/org.genivi.persistence.admin.conf
+
 # Export interface description of org.genivi.persistence.admin DBus interface
 dbusinterfaces_DATA = ../dbus_specifications/org.genivi.persistence.admin.xml