Add MiqReport::Generator#generate_interval_metric_results
Add MiqReport::Generator#generate_interval_metric_results

Also switches this out instead of what was in `_generate_table`.

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