[r=sidnei],[bug=1202480] Use isMaster.localTime instead of eval
[r=sidnei],[bug=1202480] Use isMaster.localTime instead of eval

In mongo 2.4.x (default in saucy), eval requires admin privileges. Replace by
isMaster which does not require admin privileges (but requires mongo 2.2 at
minimum).

Thanks to Gustavo for the help in implementing the fix.
alesstimec/juju,voidspace/juju,davecheney/juju,davecheney/juju,reedobrien/juju,mattyw/juju,fwereade/juju,mhilton/juju-juju,kat-co/juju,howbazaar/juju,bac/juju,rogpeppe/juju,tsakas/juju,Altoros/juju-vmware,howbazaar/juju,Altoros/juju-cloudsigma,tasdomas/juju,gabriel-samfira/juju,sinzui/juju,AdamIsrael/juju,AdamIsrael/juju,ericsnowcurrently/juju,makyo/juju,alesstimec/juju,perrito666/juju,anastasiamac/juju,dimitern/juju,marcmolla/juju,bogdanteleaga/juju,anastasiamac/juju,waigani/juju,cherylj/juju,makyo/juju,frankban/juju,dimitern/juju,cherylj/juju,cmars/juju,axw/juju,anastasiamac/juju,fwereade/juju,marcmolla/juju,howbazaar/juju,ericsnowcurrently/juju,frobware/juju,mhilton/juju-juju,frankban/juju,reedobrien/juju,perrito666/juju,dooferlad/juju,tasdomas/juju,marcmolla/juju,bz2/juju,tsakas/juju,mjs/juju,bogdanteleaga/juju,cloud-green/juju,AdamIsrael/juju,mikemccracken/juju,marcoceppi/juju,bac/juju,frobware/juju,dimitern/juju,rogpeppe/juju,bz2/juju,dooferlad/juju,bz2/juju,mjs/juju,thomnico/juju,cloud-green/juju,voidspace/juju,Altoros/juju-cloudsigma,reedobrien/store,voidspace/juju,bz2/juju,cherylj/juju,alesstimec/juju,mhilton/juju,dooferlad/juju,kat-co/juju,thomnico/juju,mikemccracken/juju,cloud-green/juju,kat-co/juju,mjs/juju,bac/juju,anastasiamac/juju,marcmolla/juju,davecheney/juju,frankban/juju-tmp,reedobrien/juju,sinzui/juju,perrito666/juju,axw/juju,axw/juju,Altoros/juju-vmware,dimitern/juju,mjs/juju,marcoceppi/juju,cherylj/juju,Altoros/juju-cloudsigma,rogpeppe/juju,tych0/juju,macgreagoir/juju,reedobrien/juju,tsakas/juju,kat-co/juju,macgreagoir/juju,cloud-green/juju,dooferlad/juju,alesstimec/juju,mhilton/juju,AdamIsrael/juju,tych0/juju,tych0/juju,Altoros/juju-vmware,cmars/juju,mattyw/juju,cmars/juju,waigani/juju,bogdanteleaga/juju,mattyw/juju,marcoceppi/juju,jrwren/juju,frankban/juju-tmp,gabriel-samfira/juju,alesstimec/juju,ericsnowcurrently/juju,frobware/juju,mattyw/juju,macgreagoir/juju,mjs/juju,makyo/juju,frankban/juju,marcmolla/juju,waigani/juju,mhilton/juju-juju,tasdomas/juju,dimitern/juju,thomnico/juju,axw/juju,axw/juju,ericsnowcurrently/juju,waigani/juju,bac/juju,bz2/juju,sinzui/juju,jrwren/juju,howbazaar/juju,frankban/juju,perrito666/juju,frankban/juju,frankban/juju-tmp,anastasiamac/juju,cmars/juju,frankban/juju-tmp,bogdanteleaga/juju,sinzui/juju,davecheney/juju,dooferlad/juju,mikemccracken/juju,tsakas/juju,wwitzel3/juju,mikemccracken/juju,mjs/juju,fwereade/juju,Altoros/juju-vmware,gabriel-samfira/juju,macgreagoir/juju,marcoceppi/juju,voidspace/juju,reedobrien/juju,wwitzel3/juju,gabriel-samfira/juju,gabriel-samfira/juju,bac/juju,mhilton/juju,thomnico/juju,jrwren/juju,macgreagoir/juju,mikemccracken/juju,mjs/juju,howbazaar/juju,Altoros/juju-cloudsigma,makyo/juju,perrito666/juju,mhilton/juju,tych0/juju,ericsnowcurrently/juju,tasdomas/juju,kat-co/juju,mhilton/juju-juju,wwitzel3/juju,fwereade/juju,wwitzel3/juju