Update rack-mount dependency to version 0.7.3
Update rack-mount dependency to version 0.7.3

openshift-quickstart/adopt-a-hydrant-openshift-quickstart,t-pfaff/adopt-a-hydrant,CostantinB/adopt-a-hydrant,friendlycode/adopt-a-hydrant,jasnow/adopt-a-hydrant,siruguri/adopt-a-drain,voyera/adopt-a-hydrant,codefornigeria/adopt-a-hydrant,baraka101/dar-adopt-a-mtaro,OpenTwinCities/adopt-a-tree,HackMichiana/adopt-a-bus-stop,0111001101111010/adopt-a-spot-odu,codeforamerica/adopt-a-hydrant,openshift-quickstart/adopt-a-hydrant-openshift-quickstart,billyfung/van-racks,codeforamerica/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,jamiekelly/adopt-a-hydrant,codeforamerica/adopt-a-siren,t-pfaff/adopt-a-hydrant,akintoey/adopt-a-hydrant,codeforanchorage/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,openoakland/adopt-a-drain,codefornigeria/adopt-a-hydrant,OpenTwinCities/adopt-a-tree,siruguri/adopt-a-drain,voyera/adopt-a-hydrant,code4sac/adopt-a-light,OpenTwinCities/adopt-a-tree,jamiekelly/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,codeforboston/adopt-a-hydrant,t-pfaff/adopt-a-hydrant,eebbesen/adopt-a-tree,codeforamerica/adopt-a-siren,eebbesen/adopt-a-tree,mapmeld/Adopt-a-Siren-Macon,jasnow/adopt-a-hydrant,codeforsavannah/adopt-a-garden,code4sac/adopt-a-light,OpenTwinCities/adopt-a-tree,jasnow/adopt-a-hydrant,baraka101/dar-adopt-a-mtaro,openshift-quickstart/adopt-a-hydrant-openshift-quickstart,friendlycode/adopt-a-hydrant,billyfung/van-racks,HackMichiana/adopt-a-bus-stop,siruguri/adopt-a-drain,Bryanprz/adopt-a-street,akintoey/adopt-a-hydrant,Bryanprz/adopt-a-street,codeforamerica/adopt-a-hydrant,mapmeld/Adopt-a-Siren-Macon,openoakland/adopt-a-drain,akintoey/adopt-a-hydrant,voyera/adopt-a-hydrant,billyfung/van-racks,CostantinB/adopt-a-hydrant,codefornigeria/adopt-a-hydrant,baraka101/dar-adopt-a-mtaro,0111001101111010/adopt-a-spot-odu,Bryanprz/adopt-a-street,jamiekelly/adopt-a-hydrant,CostantinB/adopt-a-hydrant,friendlycode/adopt-a-hydrant,codeforsavannah/adopt-a-garden,codeforboston/adopt-a-hydrant,eebbesen/adopt-a-tree,codeforanchorage/adopt-a-hydrant