Change nailgun and fuel-osft spec to match current requirements.txt

Lowers sqlalchemy requirement to actual version currently required

Change-Id: I6bc944207557bbed6be46c364c96a27f0414399f
Merge "Change nailgun and fuel-osft spec to match current requirements.txt"
US build tweaks. Do not merge.

Change-Id: If7f369078f5e1b559a2ec2aa9429f3759e037ba4