VMware: revert deletion of cleanup_host

Commit 1deb31f85a8f5d1e261b2cf1eddc537a5da7f60b removes cleanup_host
by mistake. This adds the missing method back.

Related-Bug: #1355875

Change-Id: If695bf00613fe389af91f453dbc8191698d95a94
Merge "VMware: revert deletion of cleanup_host"