Added option dual_re

Set to yes in a Dual RE scenario when 'commit sync' is enabled in the
config.
(set system commit synchronize)

library/junos_install_config

@@ -138,6 +138,12 @@ options:
             - Provide a confirm in minutes to the commit of the configuration
         required: false
         default: None
+    dual_re:
+        description:
+            - Set to yes in a Dual RE scenario when 'commit sync' is enabled in the config
+        required: false
+        default: no
+        choices: ['true','false','yes','no']
 '''
 
 EXAMPLES = '''
@@ -302,8 +308,11 @@ def _load_via_netconf(module):
                 if args['confirm'] is not None:
                     opts['confirm'] = args['confirm']
 
-                time.sleep(10)
-                cu.commit(**opts)
+                if args['dual_re']:
+                    time.sleep(10)
+                    cu.commit(**opts)
+                else:
+                    cu.commit(**opts)
 
         except CommitError as err:
             msg = "Unable to commit configuration: {0}".format(err)
@@ -404,7 +413,8 @@ def main():
             timeout=dict(required=False, default=0),
             comment=dict(required=False, default=None),
             port=dict(required=False, default=830),
-            confirm=dict(required=False, default=None)
+            confirm=dict(required=False, default=None),
+            dual_re=dict(required=False, type='bool', choices=BOOLEANS, default=False)
         ),
         supports_check_mode=True)