Switch subunit2sql to use decomposed uri

This commit switches the subunit2sql_uri which get's passed into the
config file template to use decomposed values. The advantage of this
is that it enables using subsets of the information elsewhere.

Change-Id: I30b5117c12897fa3a1cb1e2579b4eec59ba57b2b
Merge "Switch subunit2sql to use decomposed uri"