tabletserver: pull RequestContext out of requestExecutor
tabletserver: renamed and moved a few things
Be more flexible with addresses in ZkOccConnection.

Allow the set of zkocc hosts to be updated. Also, limit the number of
dial attempts for any given operation - this is useful when the set of
zkocc hosts gets large.
Merge branch 'vtocc'
Add -follow flag for zkctl and mysqlctl.
Running zkctl in Docker.
Rename to 'refresh' since 'update' is a semantically loaded term in Python.
Refactoring MigrateServedFrom to split master and regular cases.
New simpler faster logic for masterMigrateServedFrom.

We dont' set the source master read-only any more, just use
blacklisted tables to achieve the same result.
Merge pull request #85 from plobsing/zkocc-conn-addrs

Zkocc conn addrs
Fail fast and report errors when parsing zk config files.
Fixing a couple comments from the review.
Merge branch 'master' of github.com:youtube/vitess
Running action callbacks synchronously now.

Since everything is RPCs, it's better that way really.
Adding error returns to a few methods.
Better comments.
Merge branch 'master' into replication
Allowing ShardReplicationFix to remove a misplaced tablet.

Also more logging in wrangler.
Better HTML so it displays right.
Logging an action to the right place.