[#6711] refactor few tests out of TestRestUpdateTicket and into TestRestIndex
[#6711] don't delete TicketMonitoringEmail from the database

ForgeTracker's RootRestController.index strips TicketMonitoringEmail from the
response, but was inadvertently removing it from the database also.  The
app.config.__json__() result included a ming-instrumented collection so removing
an item from that caused ming to flush that delete to the database.