Fix check instance host for instance action

When instance has no host, actions such as get_console_output,
start_stop_instance cause HTTP 500 response. Here change to
HTTPConflict when action called before host set.

Fix LP# 1116012

Change-Id: I6153a03f449d9fad8d0d8fb7295bdea4d2b2c2b1
Update .coveragerc

Set up proper source and omit options.

Change-Id: I28e95c5dde5d906dc2bf44b647017f8cff5981f6
Implements: blueprint update-coveragerc
Adds _(prerun|check)_134 functions to test_migrations

The _prerun_134 function populates the 'bw_usage_cache'
table with real data, different in some critical ways,
before migrating it. _check_134 function certifies that
things were properly migrated.

Partially implements bp migration-testing-with-data

Change-Id: I4100c8aa3e1c9d2ff4fdb095dba4cb084b5df279
Update to simplified common oslo version code.

Based on https://review.openstack.org/#/c/19957/

Change-Id: Ieefee2af8812d0217e95eeffb3cf53d8e55c8fe6
Fixes a bug in attaching volumes on Hyper-V

Fixes bug: #1122264

The CIM v2 WMI context needs to be instantiated by the BaseVolumeUtils
class and not passed by the caller of get_iscsi_initiator().

Change-Id: I811b5bd0117b0035c18e5c90169b25a095bc54e9
More conductor support for resizes

This patch adds more support for resizes to conductor, which apparently
are not getting tested in the "full" tempest gate.

This adds network_migrate_instance_{start,finish}() calls to conductor,
which offloads the network_api calls of similar name over RPC for
components that can't take the DB hit of calling network_api directly.
Also, in quota, the commit and rollback calls hit the database, so
export those from conductor as well.

This is likely the source of the failures in bug 1119817

Change-Id: I56bb65b0e168e36e138cf6bf125d6e83bf71f50b
Merge "Fix check instance host for instance action"
Merge "Update .coveragerc"
Merge "Fixes a bug in attaching volumes on Hyper-V"
Merge "Adds _(prerun|check)_134 functions to test_migrations"
Merge "Update to simplified common oslo version code."
Merge "More conductor support for resizes"