Remove redundant update steps
Remove redundant update steps

Only recreate VM once if resource pool changed or network update failed.
Update settings only if we didn't recreate the VM entirely.

Signed-off-by: Maria Shaldibina <dc03896a0185453e5852a5e0f0fab6cbd2e026ff@pivotal.io>

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh