Add parametric tests of Swift object API, part 4

Add positive tests of Swift object "COPY" APIs from the viewpoint of
completeness of query parameters.

Change-Id: Iada4a9e00ce66dccd46993fd3edcc39c625c9022
Separate create server schema for admin password

admin password attribute in create server API's response
depend on the conf variable "enable_instance_password".

This patch separate create server schema based on this conf variable.

Partially implements blueprint nova-api-attribute-test

Change-Id: I897dd22dd5e130b4597b84c0e80eaed68c3e96a9
Tag test_nova_keypair_resources as gate, not slow

This test doesn't boot any servers (not even cirros) so it can be
a standard gate test.

Change-Id: I73b84816d0fbedb65b395d7bc2ab3644262d898c
Partial-Bug: #1350099
Merge "Add parametric tests of Swift object API, part 4"
Merge "Separate create server schema for admin password"
Merge "Tag test_nova_keypair_resources as gate, not slow"