The CLI was not working properly with mutual TLS
enabled.  In order to add support for client
certficates, the code needed to be partially
refactored by adding peer and orderer client
instances.  This code should be useful in the
future as part of any additional CLI rework.

Change-Id: Ifa19c26bf3aff887c5279a8f721e0425ec49732e
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>