'Create Volume Snapshot' form should show the quota for snapshot

When creating a new volume snapshot the window shows the quota of number
of volumes and what should be shown is the quota of snapshots.
Basically, the code was pasted from "Create Volume" and nothing has been
changed to respect the equivalent quotas.

Change-Id: Ifbfa84a008d7b61e4b53f885793c5a1750dade3c
Closes-bug: 1282172
fix Instance table's Flavor Detail popover not showing up

Using the Flavor ID as the unique ID for the popover causes
problems - if you have multiple instance with the same flavor,
the popover would not show up except for the first in the list.

Solution is to have a unique ID using the instance ID.

Change-Id: If3a43b90f524aa780aac4ecece5dbbbbba75137b
Closes-Bug: #1342907
Initial support for datastore in Horizon

Added datastore type and version columns in Instance Table
Added datastore type and version in Instance Details
Added appropriate Connection Examples (for each datastore type) in Instance Details

Launch Database has single dropdown with the following behavior:
- Auto select only if there's one datastore type and version
- Otherwise, enforce user to choose one
- Single dropdown uses optgroups to group versions for each datastore type

Implements: blueprint datastore-support

Author:    Michael Yu <michayu@ebaysf.com>
Co-Authored-By:    Ramashri Umale <rumale@ebaysf.com>
Change-Id: Iec3fb81e1fd85c653418b27d54b10c439fb3fa30
Merge "Initial support for datastore in Horizon"
Merge "fix Instance table's Flavor Detail popover not showing up"
Merge "'Create Volume Snapshot' form should show the quota for snapshot"