resolve dynamic networks in apply spec before saving it
added explanation why there is no need to wait_until_ready after configure_networks

Signed-off-by: dmitriy kalinin <dmitriy@pivotallabs.com>
keep original network hash in apply spec so that director does not think that vm network configuration diverged

Signed-off-by: dmitriy kalinin <dmitriy@pivotallabs.com>
Adding final release for build 2539