rpc: specify connection options in API config

Specify RPC connection options once in API.bootstrap rather than in each
invocation of rpcclient.connect.

https://fedorahosted.org/freeipa/ticket/4739

Reviewed-By: David Kupka <dkupka@redhat.com>

ipalib/backend.py

@@ -122,8 +122,7 @@ class Executioner(Backend):
         if self.env.in_server:
             self.Backend.ldap2.connect(ccache=ccache)
         else:
-            self.Backend.rpcclient.connect(verbose=self.env.verbose,
-                fallback=self.env.fallback, delegate=self.env.delegate)
+            self.Backend.rpcclient.connect()
         if client_ip is not None:
             setattr(context, "client_ip", client_ip)