Bootstrap server service, fixes to server state management

* Added bootstrap service call to do DBMS side bootstrap operations
  during the cluster bootstrap.
* Added last_committed_gtid() to provider interface
* Implemented wait_for_gtid() provider call
* Pass initial position to the server state

include/wsrep/view.hpp

@@ -86,7 +86,6 @@ namespace wsrep
 
         int protocol_version() const
         { return protocol_version_; }
-
         const std::vector<member>& members() const { return members_; }
 
         /**