testing: increase mongo timeout
testing: increase mongo timeout

CI is regularly failing on mongo
tests with "i/o timeout". Increasing
the timeout to see if it improves
the situation. This will cause longer
delays only when tests are misbehaving.

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