Add specs for active record number_of method
Add specs for active record number_of method

I added these specs because I was trying to improve performance.
Turns out it works fine.

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