[master] also wait for auth server to be started before query

This is in the Load and response scenario.

This is to fix lettuce failures see on mac and debian automated lettuce
runs.

This was just a timing race.

Also I didn't check for BIND10_STARTED_CC as done elsewhere
since that never worked. I opened a ticket for that: #1900.

tests/lettuce/features/inmemory_over_sqlite3.feature

@@ -5,5 +5,6 @@ Feature: In-memory zone using SQLite3 backend
 
     Scenario: Load and response
         Given I have bind10 running with configuration inmemory_over_sqlite3/secondary.conf
+        And wait for bind10 stderr message AUTH_SERVER_STARTED
         A query for www.example.org should have rcode NOERROR
         The SOA serial for example.org should be 1234