added loop to detect Guest Service Interface as OK
Check if Guest service is Enabled [GH-61]

Add a loop to check if the Guest service feature is enabled, this loop is
to make sure the service is enabled and prevent any race condition before calling the copy-vm cmdlet.
Revert "Check if Guest service is Enabled [GH-61]"

This reverts commit d3ea42f2a620d1422eaf3a5354218a0b345c7497.
Merge pull request #61 from erichexter/master

added loop to detect Guest Service Interface as OK
Check if Guest service Enabled.

Few improvemnts on GH #61, check if Guest service is enabled before
exiting from the loop.
Merge branch 'master' into develop

Conflicts:
	lib/vagrant-windows-hyperv/scripts/upload_file.ps1