streamchain

This patch structures the cryptogen output in a way that
makes it more directly consumable.  The output for each
node looks like:

└── peer4.org1
    ├── msp
    │   ├── admincerts
    │   │   └── Admin@org1-cert.pem
    │   ├── cacerts
    │   │   └── org1-cert.pem
    │   ├── keystore
    │   │   └── 0aa7a89070ce8322a4dc3fac2206fa8313b88fb625c70963934714d4129d2897_sk
    │   └── signcerts
    │       └── peer4.org1-cert.pem
    └── tls
        ├── ca.crt
        ├── server.crt
        └── server.key

The notable differences are that we push the msp content down under ./msp, and we
add the ./tls directory.  The crypto material under tls is simply duplicated
content from the MSP, as appropriate, to present a consistent layout for
consumption by the TLS layer.  We also update the default paths in the config
to be consistent with this layout.

Fixes FAB-3453

Change-Id: I8e149035b92a4758d6c87c03306c08b82687683f
Signed-off-by: Gregory Haskins <gregory.haskins@gmail.com>