added test -attempt to insert a companion plant entry that already exists https://app.asana.com/0/201954860780444/205761505868189
added test -attempt to insert a companion plant entry that already exists
https://app.asana.com/0/201954860780444/205761505868189

rdicharry/growify-fork-20161209,DannyEaton/growify,DannyEaton/growify,rdicharry/growify-fork-20161209,rdicharry/growify-fork-20161209,DannyEaton/growify