Change vttablet and tools to accept dbconfig and queryserver configs in command line
Update config parameter code
Merge branch 'master' into config

Conflicts:
	go/vt/tabletserver/queryctl.go
	test/connection_test.py
Merge branch 'master' into config
Merge branch 'master' into config

Conflicts:
	go/vt/tabletserver/cache_pool.go