Add support for Trove Replication

Added initial support for replication.
Changed launch dialog to have an Advanced tab where
you can select a master instance for replication
Display replication information in details view
Added support for Detach

Change-Id: I2c90d5be0f47c07fe9049a685fbf7a36a2585e0e
Implements: blueprint trove-replication-v1-support
Revert "Change default cache to LocMem rather than memcached to avoid"

This reverts commit 90156da422c808251702468981194b8b0126d5e9.
Redid the fix to use LocMem instead of
memcached - but this time I am making
sure the commit message line lenght is
small to avoid PEP8 issues later