This patch obsoletes Legacy APIs excluding VIM feature.
And this patch mainly contains the following changes:
* Drop the implementation/db of NS and VNFFG functions.
* Remove the implementation that was used only by Legacy VNFM features.
* Remove the following components used only by Legacy features.
* ceilometer
* fenix
* blazar
* Drop the functional test jobs for Legacy features.
* Delete the unnecessary files that were used in Legacy tests.
Implements: blueprint deprecate-legacy-apis
Change-Id: I76ba79f42cf7c3f04c48a87de4ae893f2d53e467
f410d66e83