get context from req rather than getting a new admin context

This patch removes the call to context.get_admin_context() and instead
obtains the context from the req object. Allowing the context.auth_token
to be reused.

Fixes bug 1161081

Change-Id: I3b104edc2966fc3263fad824b1c4c99df832672e
Imported Translations from Transifex

Change-Id: I737b11916a85c9694b1f47ec89e66947cd188bb1
Set default fixed_ip quota to unlimited.

DocImpact: our previous default quota of ten was poorly thought through
and resulted in upgrade problems. Instead, let's have operators opt into
fixed IP quotas. This change should be mentioned in release notes please.

Resolves bug 1161190.

Change-Id: I2f066a0129461899fe330a628cf49ee5273eaba4
'injected_files' should be base 64 encoded.

If an instance build needs to be rescheduled, send the original
base 64 encoded injected_files parameter.

bug 1161479

Change-Id: I4dad95e95cd27f7f128989daa36b3a2bbf132c73
Merge "Imported Translations from Transifex"
Fix automatic confirmation of resizes for no-db-compute

compute/api.py:confirm_resize() was still making a bunch of calls
against the database that were tripping over the no-db-compute
enforcement checks. Instead of trying to unwind all of the instance
action, quota, etc code and divert to conductor, just farm out the
entire confirm_resize() call to conductor.

Fixes bug 1161402

Change-Id: I121040a3b575f5866d45cc8ef6862d67f5558715
Merge "'injected_files' should be base 64 encoded."
Merge "Set default fixed_ip quota to unlimited."
Merge "get context from req rather than getting a new admin context"
Merge "Fix automatic confirmation of resizes for no-db-compute"