python-tackerclient has been modified to invoke Tacker MANO API
directly for VNF and VNFD resource requests. The current wrapper
implementation of invoking servicevm REST APIs has been removed.
Change-Id: I447fd971d97987911d5e85abafc94a24599ac209
Implements: blueprint tacker-api-mano
Depends-On: I9dffd4bee25b1f49aea7478f2bd779cf0f6dfb49