Add policy event host_failure.
Add policy event host_failure.

https://bugzilla.redhat.com/show_bug.cgi?id=1495265

djberg96/manageiq,chessbyte/manageiq,yaacov/manageiq,agrare/manageiq,jameswnl/manageiq,mzazrivec/manageiq,juliancheal/manageiq,ManageIQ/manageiq,jameswnl/manageiq,romanblanco/manageiq,mkanoor/manageiq,ManageIQ/manageiq,agrare/manageiq,jrafanie/manageiq,lpichler/manageiq,yaacov/manageiq,yaacov/manageiq,billfitzgerald0120/manageiq,ManageIQ/manageiq,agrare/manageiq,pkomanek/manageiq,skateman/manageiq,hstastna/manageiq,hstastna/manageiq,pkomanek/manageiq,tinaafitz/manageiq,d-m-u/manageiq,jameswnl/manageiq,chessbyte/manageiq,NickLaMuro/manageiq,syncrou/manageiq,mzazrivec/manageiq,syncrou/manageiq,aufi/manageiq,borod108/manageiq,jameswnl/manageiq,chessbyte/manageiq,gmcculloug/manageiq,lpichler/manageiq,NickLaMuro/manageiq,d-m-u/manageiq,branic/manageiq,andyvesel/manageiq,agrare/manageiq,syncrou/manageiq,kbrock/manageiq,aufi/manageiq,pkomanek/manageiq,mzazrivec/manageiq,pkomanek/manageiq,lpichler/manageiq,skateman/manageiq,jvlcek/manageiq,andyvesel/manageiq,NickLaMuro/manageiq,hstastna/manageiq,ManageIQ/manageiq,kbrock/manageiq,romanblanco/manageiq,jvlcek/manageiq,jvlcek/manageiq,djberg96/manageiq,d-m-u/manageiq,branic/manageiq,kbrock/manageiq,branic/manageiq,kbrock/manageiq,djberg96/manageiq,hstastna/manageiq,branic/manageiq,tinaafitz/manageiq,gmcculloug/manageiq,andyvesel/manageiq,romanblanco/manageiq,billfitzgerald0120/manageiq,NickLaMuro/manageiq,billfitzgerald0120/manageiq,d-m-u/manageiq,romanblanco/manageiq,aufi/manageiq,gmcculloug/manageiq,skateman/manageiq,jrafanie/manageiq,djberg96/manageiq,billfitzgerald0120/manageiq,borod108/manageiq,syncrou/manageiq,borod108/manageiq,andyvesel/manageiq,chessbyte/manageiq,juliancheal/manageiq,juliancheal/manageiq,yaacov/manageiq,jvlcek/manageiq,mkanoor/manageiq,mkanoor/manageiq,mzazrivec/manageiq,skateman/manageiq,jrafanie/manageiq,juliancheal/manageiq,borod108/manageiq,mkanoor/manageiq,gmcculloug/manageiq,lpichler/manageiq,aufi/manageiq,tinaafitz/manageiq,jrafanie/manageiq,tinaafitz/manageiq