Dan Smith 979639b21c Setup CellsV2 environment in base test ...

This makes us automatically set up a usable CellsV2 environment in
the base test case, if we're setting up database stuff. If the test
uses the DB normally, we get a cell0, a real cell, and create
hostmappings for any compute services that we start. If we're not
a DB-using test, we mock out the cell mapping stuff so that
everything appears to just be in the same cell.

This includes a fix for the nova-manage tests, which need to control
their own cells destiny now.

This includes a fix to the pci tests for libvirt, which were starting
the same compute service twice in a row. That no longer works because
we fail to create the duplicate hostmapping record, but we should not
have been doing that anyway. This makes us only create it once.

This includes a fix to the connection switching test to set up the
database fixtures itself since it requires a specific environment
that we now confuse by always going through the CellDatabases fixture.

Change-Id: I435bf18ab66ad1469c03f0cf3027033a5751af6f

2016-12-09 10:30:43 -08:00

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