Synchronize helm repos on ns instantiation instead of creation

Change-Id: Ia4f35283399d2777ff3df1fb2824a68cbaec4804
Signed-off-by: lloretgalleg <illoret@indra.es>
diff --git a/n2vc/k8s_conn.py b/n2vc/k8s_conn.py
index f9aefa7..6ac8119 100644
--- a/n2vc/k8s_conn.py
+++ b/n2vc/k8s_conn.py
@@ -123,6 +123,20 @@
         """
 
     @abc.abstractmethod
+    async def synchronize_repos(
+            self,
+            cluster_uuid: str,
+            name: str
+    ):
+        """
+        Synchronizes the list of repositories created in the cluster with
+        the repositories added by the NBI
+
+        :param cluster_uuid: the cluster
+        :return: List of repositories deleted from the cluster and dictionary with repos added
+        """
+
+    @abc.abstractmethod
     async def reset(
             self,
             cluster_uuid: str,