fix unit test to handle

unittests/bash/tests/init-containers/config/config_environment.bats

@@ -39,7 +39,8 @@ function execute_test_script() {
   currentEnvsAfter=$(env | sort)
 
   # diff as unified +/- output without context before/after
-  diff --unified=0 <(echo "$currentEnvsBefore") <(echo "$currentEnvsAfter")
+  # non-zero value returned when differences exist, which is expected
+  diff --unified=0 <(echo "$currentEnvsBefore") <(echo "$currentEnvsAfter") || true
 
   exit $exitCode
 }