1. enable changing persistency in faces/update command 2. reject faces/create request if the face already exists 3. nfdc changes to support the above Change-Id: I659906da846608a42a768f08fb110ceee1a947a7 refs: #3232
refs #3864 Change-Id: Icca589eceae0b78f68cda61e761dd4721ce54f9c
refs #3864 Change-Id: Ibee7b082681edc35e8c272b2363436dbc7eaf9c0