Adding support for rescue and unrescue to OSC. Co-Authored-By: Michael Turek <mjturek@linux.vnet.ibm.com> Co-Authored-By: Dao Cong Tien <tiendc@vn.fujitsu.com> Change-Id: Id865d7c9a40e8d85242befb2a0335abe0c52dac7 Depends-On: I3953ff0b1ca000f8ae83fb7b3c663f848a149345 Partial-bug: 1526449