Replace Directgov rule with mappings

In reference to https://www.pivotaltracker.com/story/show/74044338

The mappings generated as part of [this commit](https://github.com/rjc123/redirector/commit/1e2b9e6fea67ac186fd6cd1ea6ad99cdaab959a5) are based on transition-stats as of 30th June 2014. These are designed to replace the rule implemented to handle multi-surfacing ```dg_\d*``` documents with single mappings (originally for efficiency / certainty).    

For example, [this link](http://www.direct.gov.uk/en/crimejusticeandthelaw/prisonandprobation/dg_070333) is a new mapping designed to replicate the rule that used [this link's](http://www.direct.gov.uk/en/crimejusticeandthelaw/sentencingprisonandprobation/communitysentences/dg_070333) mapping as the authoritative source for the document. 

This closing brace isn't needed any more and is causing the build failure. The line above also needs to be indented by an additional two spaces to be consistent with the rest of the file.