driver: Ensure that "prlsrvctl" returns info about DHCPv4 server

Fixes issue #163
config: Added 'post-import' customization step [GH-165]
Version bumped to 1.3.7
Release v1.3.7

* master:
  Version bumped to 1.3.7
  config: Added 'post-import' customization step [GH-165]
  driver: Ensure that "prlsrvctl" returns info about DHCPv4 server