CFMigrations: Error displayed on missing grammer

[dbelanger]

First reported in Jira: https://ortussolutions.atlassian.net/browse/BOX-93?filter=-2

When we try to run a migration from the command line, we get the following error:

In a nutshell, the grammar wasn't defined when we hit the "migrate up" but we had no idea where to look. The error you'll see is

So Brad suggested improving the error message at this point.