connman_test.sh: show all processes when dumping ps

We know the grep failed because the error case is being executed, so don't do
the grep again when attempting to help diagnose the problem, as seeing the full
process list might be useful.

(From OE-Core rev: 6ee4a2ba6ee9633c1fa08d3b162d6d00da307798)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/qemuimage-tests/tools/connman_test.sh

@@ -45,7 +45,7 @@ fi
 
 if [ $count -ne 1 ]; then
 	Target_Info "connmand has issue when running in background, Pls, check the output of ps"
-	${PS} | grep connmand
+	${PS}
 	exit 1
 fi