tests: fix a race condition in ivi-shell tests

ivi-shell tests load their own controller plugin
for testing purposes. Tests also uses the generated
weston-ivi.in config file, which causes weston to
load hmi-controller and its helper client.
Existence of hmi-controller and its helper client
confuses test plugins. Because they are creating
surfaces and layers which are not expected by
test plugins.

We can start ivi-shell tests without config file
to solve this problem. Then, weston will not load
hmi-controller plugin.

Reported-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Signed-off-by: Emre Ucan <eucan@de.adit-jv.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Acked-by: Daniel Stone <daniels@collabora.com>

tests/weston-tests-env

@@ -44,7 +44,7 @@ case $TEST_FILE in
 		WESTON_BUILD_DIR=$abs_builddir \
 		WESTON_TEST_REFERENCE_PATH=$abs_top_srcdir/tests/reference \
 		$WESTON --backend=$MODDIR/$BACKEND \
-			--config=$abs_builddir/tests/weston-ivi.ini \
+			--no-config \
 			--shell=$SHELL_PLUGIN \
 			--socket=test-${TEST_NAME} \
 			--modules=$TEST_PLUGIN,$MODDIR/${TEST_FILE/.la/.so}\
@@ -74,7 +74,7 @@ case $TEST_FILE in
 		WESTON_TEST_REFERENCE_PATH=$abs_top_srcdir/tests/reference \
 		WESTON_TEST_CLIENT_PATH=$abs_builddir/$TEST_FILE \
 		$WESTON --backend=$MODDIR/$BACKEND \
-			--config=$abs_builddir/tests/weston-ivi.ini \
+			--no-config \
 			--shell=$SHELL_PLUGIN \
 			--socket=test-${TEST_NAME} \
 			--modules=$TEST_PLUGIN \