Feature #2879: Added configuration parameter to control vswp files

(cherry picked from commit 715658cefe1a627b94db7521c7af58a6a73c44b7)
Bug #2910: Add hostname back into driver action message

(cherry picked from commit b6761ae4342e28d3e01290e88be5319d85569e96)
Bug #2873: Check if VM is defined and acquire it instead of cowardly failing

(cherry picked from commit ef97a6e8a9fe1d351d9461aea54c8bda3d5c319e)