Added missing test coverage for config.go,removed
unused code and cleaned up a bit to aid in
eventually removing test code from peer.go.

Increased # lines covered from 51% to 78%

Change-Id: I0249d3c9edf6f764b2c1b66dc4af3af1048430a4
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>