Makes sure required powervm config options are set

Fixes bug 1132931

Defaulting values of powervm_img_local_path and
powervm_img_remote_path configuration options.

Change-Id: I310422bccb84fc0ae12e43b06b4d85e683a91daf
Merge "Makes sure required powervm config options are set"
Merge remote-tracking branch 'm_src_repo/master' into build-temp