https://jira.hyperledger.org/browse/FAB-2745



NOTE: needed to touch multiple parts of the
system to get TLS working e2e but this seemed
like the best approach

- changed default compose files to require TLS
- renamed original compose file to *-no-tls.yaml
- modified peer to pass peer.tls.rootcert instead of
peer.tls.cert to client connections and chaincode
container
- modified go chaincode to use rootcert and
fallback to cert
- fixed some logic in the getTLSCert method
- modified TLS startup logic for orderer
- moved casupport to core/comm package
- modified configtx.yaml to use orderer0 for
orderer address to match its certificate
- regenerated orderer.block and channel.tx using
updated configtx.yaml
- added singleton CASupport object to the core/comm
package
- added flags and supporting code for TLS to CLI
commands which communicate with an orderer endpoint
- modified deliverclient to support TLS credentials
which are dynamically updated via config blocks

Change-Id: Ifd69b08ada90f3d579697c2b7ef027789a799f04
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>