Propagate creation errors with exceptions

Change-Id: I567f1901e1203930d282620112368ac32440b9ed
Mark resources as failed when creation aborted

Previously resources would be left in the CREATE_IN_PROGRESS state in the
event of a timeout or the thread being cancelled (due to a delete being
requested while the stack was still being created). We should instead put
these resources into the CREATE_FAILED state when this occurs, thus
creating an event with the reason.

Change-Id: I05956aa9ef26941b79cef9dbf0cb6a347047d199
Mock delete_network in Quantum unit tests

Change-Id: I0a1f0e56ed84aa4efcdf7c65c7c634f738bdddda
Propagate deletion errors with exceptions

Change-Id: Ib8380f6d985e328c56d53b326700d6c9df636f40
Consolidated api-paste.ini file

Load a single api-paste.ini file, specified by config
Delete unused paste.ini files
Update docs for new paste.ini and config arrangement

There will be a corresponding devstack change, and once this is in
I will email the packagers on the packaging implications

Change-Id: Ic10b1a486094d15bfd832f0f934e6268ec323085
Merge "Propagate creation errors with exceptions"
Merge "Mark resources as failed when creation aborted"
Merge "Mock delete_network in Quantum unit tests"
Merge "Propagate deletion errors with exceptions"
Merge "Consolidated api-paste.ini file"