Remove warn log in quota function on API layer

An API layer function in quotas print warn message when in input
is not valid, it's useless since an exception will be raised.

Change-Id: I707416aae29e56ad1c7d2cc55ca8c662bf5547f5
Spice proxy config setting to be read from the spice group in nova.conf

All spice configuration should be read from the spice group
in the nova config. As it's currently being done in the nova.spice
module.
Renaming spicehtml5proxy_{host, port} parameters to
html5proxy_{host, port}

DocImpact
Change-Id: I36c014c8b8a0796cda494f9450a1fc30104504a1
Closes-Bug: #1308418
Set default auth_strategy to keystone

It doesn't make much sense to default to no authentication in
production. We should always have production ready defaults.

DocImpact Changing default config option.

Change-Id: Ife63dc7ab680fcf0588d95c98fc9f29901485c64
Fix typo in unit tests

A couple of unit tests misspelt 'factory'.

Fixes bug 1312776

Change-Id: I1c3a7ba63671aff4d866d0501c941ce637238546
Merge "Fix typo in unit tests"
Merge "Set default auth_strategy to keystone"
Merge "Remove warn log in quota function on API layer"
Merge "Spice proxy config setting to be read from the spice group in nova.conf"