Fix regression in integration test

Author: jshum2479

core/src/main/python/wlsdeploy/tool/discover/domain_info_discoverer.py

@@ -168,4 +168,6 @@ def get_roles(self):
                         model[role_name] = dict()
                         model[role_name][model_constants.EXPRESSION] =  role_expression
             return model_folder, model
+        else:
+            return model_folder, model
 

system-test/src/test/java/oracle/weblogic/deploy/integration/BaseTest.java

@@ -158,7 +158,6 @@ protected void verifyResult(ExecResult result, String matchString) throws Except
         if(result.exitValue() != 0 || !result.stdout().contains(matchString)) {
             logger.info("DEBUG: result.exitValue=" + result.exitValue());
             logger.info("DEBUG: result.stdout=" + result.stdout());
-            System.exit(0);
             throw new Exception("result stdout does not contains the expected string: " + matchString);
         }
     }

system-test/src/test/java/oracle/weblogic/deploy/integration/ITWdt.java

@@ -512,9 +512,6 @@ public void testFDiscoverDomainWithRequiredArgument() throws Exception {
 
         logger.info("executing command: " + cmd);
         ExecResult result = ExecCommand.exec(cmd);
-        logger.info("DEBUG: result rc=" + result.exitValue());
-        logger.info("DEBUG: result stdout" + result.stdout());
-        logger.info("DEBUG: result stderr" + result.stderr());
 
         verifyResult(result, "discoverDomain.sh completed successfully");