Update bigbluebutton_rails for "invitation-url" metadata
Update bigbluebutton_rails for "invitation-url" metadata

refs #1616

mconf-rnp/mconf-web,lfzawacki/mconf-web,mconf-ufrgs/mconf-web,mconf/mconf-web,lfzawacki/mconf-web,mconf/mconf-web,mconftec/mconf-web-uergs,mconftec/mconf-web-mytruecloud,mconftec/mconf-web-mytruecloud,mconftec/mconf-web-mytruecloud,fbottin/mconf-web,mconf-rnp/mconf-web,akratech/Akraconference,lfzawacki/mconf-web,mconf/mconf-web,mconf-ufrgs/mconf-web,mconf-rnp/mconf-web,mconf-rnp/mconf-web,amreis/mconf-web,becueb/MconfWeb,akratech/Akraconference,lfzawacki/mconf-web,mconf-ufrgs/mconf-web,fbottin/mconf-web,akratech/Akraconference,mconftec/mconf-web-santacasa,becueb/MconfWeb,fbottin/mconf-web,mconftec/mconf-web-santacasa,mconftec/mconf-web-uergs,mconftec/mconf-web-santacasa,mconftec/mconf-web-uergs,fbottin/mconf-web,mconftec/mconf-web-uergs,mconftec/mconf-web-santacasa,becueb/MconfWeb,mconftec/mconf-web-mytruecloud,amreis/mconf-web,akratech/Akraconference,mconf-ufrgs/mconf-web,mconf/mconf-web,amreis/mconf-web,amreis/mconf-web,becueb/MconfWeb