VMware: ensure test case for init_host in driver

Commit 1deb31f85a8f5d1e261b2cf1eddc537a5da7f60b caused a regression.
This patch ensures that there is a unit test validating that the
driver implements the method.

Change-Id: I6086aeb1e9a8937d13aae41d8a4b74c25bb802f6
Merge "VMware: ensure test case for init_host in driver"