Now merging in minor old ec2_provision changes that I'd forgotten about
Now merging in minor old ec2_provision changes that I'd forgotten about

macarthur-lab/seqr,macarthur-lab/seqr,macarthur-lab/xbrowse,ssadedin/seqr,ssadedin/seqr,macarthur-lab/xbrowse,macarthur-lab/xbrowse,ssadedin/seqr,macarthur-lab/xbrowse,macarthur-lab/seqr,ssadedin/seqr,macarthur-lab/seqr,macarthur-lab/xbrowse,macarthur-lab/seqr,ssadedin/seqr,macarthur-lab/xbrowse