Add check for "rg_name" parameter in case of resource group creating

library/decort_rg.py

@@ -507,9 +507,16 @@ def main():
 
     else:
         if amodule.params['state'] in ('present', 'enabled'):
-            decon.create() 
-            if amodule.params['access']:
-                decon.access()
+            if not amodule.params['rg_name']:
+                decon.result['failed'] = True
+                decon.result['msg'] = (
+                    'Resource group could not be created because'
+                    ' the "rg_name" parameter was not specified.'
+                )
+            else:
+                decon.create() 
+                if amodule.params['access']:
+                    decon.access()
         elif amodule.params['state'] in ('disabled'):
             decon.error()