Revert 6df3f08..727a97d

This rolls back to commit 6df3f08d480ce500c2c7b4e8aeb7ef86286e69ae.
Revert "Update gems and set production DB to postgresql"

This reverts commit 6df3f08d480ce500c2c7b4e8aeb7ef86286e69ae.
Update testing gems