735c45070e
In HTTPNotImplemented cases, each API passes its original message. The meaning of these messages are almost the same but messages are inconsistent. This patch adds common raise_feature_not_supported() and replaces these messages with the method for consistent message. Partially implements blueprint v2-on-v3-api Change-Id: I23da9bf153cb92944c0f4e76d70ce72a4ff6b16f