[BUGFIX] Remove invalid argment quuoting in runTests.sh (#1029)

`Build/Scripts/runTests.sh` provides a test-suite `composer`
and allows passing additional command and options directly
down to the composer command.

Due to an invalid quoting the passed options were broking
and not regonized by the `composer` binary.

This change removes the superflous argument passing
and therefore allows passing additional options to the
`composer` command.

Resolves: #967

Build/Scripts/runTests.sh

@@ -468,7 +468,7 @@ case ${TEST_SUITE} in
         cleanTestFiles
         ;;
     composer)
-        COMMAND="composer \"$@\""
+        COMMAND="composer $@"
         ${CONTAINER_BIN} run ${CONTAINER_COMMON_PARAMS} --name composer-command-${SUFFIX} -e COMPOSER_CACHE_DIR=.cache/composer -e COMPOSER_ROOT_VERSION=${COMPOSER_ROOT_VERSION} ${IMAGE_PHP} /bin/sh -c "${COMMAND}"
         SUITE_EXIT_CODE=$?
         ;;