added some new functions to client lib. functions added: 1- metadata_set: to add pcr values based on uuid of the node 2- metadata_delete: to remove the pcs values
added some new functions to client lib.
functions added:
1- metadata_set: to add pcr values based on uuid of the node
2- metadata_delete: to remove the pcs values

CCI-MOC/haas,SahilTikale/haas