Add retype feature for Kaminario K2 iSCSI and FC cinder drivers.
Use deprecation mechanism for option 'kaminario_nodedup_substring'.
Use get on connector dict for 'host' and 'wwpns'.
Implements: blueprint k2-retype
Co-Authored-By: Sreedhar Varma<Sreedhar.Varma.ctr@kaminario.com>
Co-Authored-By: Lakshman<Lakshmi.Narayana.ctr@kaminario.com>
Co-Authored-By: VenkataKrishna Reddy <Venkata.Krishna.ctr@kaminario.com>
Change-Id: I5cf20742e2ec8c1f785f3d6352de11e9198908a1
