[FAB-1141] Added deployment to boostrap feature

Added concept of cert alias for developers working
with a channel.

Added new CLI command 'peer chaincode package' to support
the ability to leverage the locally built peer to create
deployment specs using chaincode specs.

Now support caching of deployment specs with user config option
cache-deployment-spec.  For example:

   >behave -k -D cache-deployment-spec  features/bootstrap.feature

Added slugify function, requires pip install:

   >sudo pip install python-slugify.

Regenerated peer/proposal_response proto and peer/chaincode
proto.

Updated endorsment process to use updated proto definitions.

Changed to use of /var/sock and volume for CORE_VM_ENDPOINT setting
in compose-defaults.yml.

Changed from beta grpc usage in python to grpc.  Set max message
size on python grpc channel creation.

Added ContextHelper for GUUID usage and future temp/cache storage.

Generated peer/peer and peer/proposal protos.

Deleted older generated python proto files.

Changed logging of proposal payload to min of 128 or lenghth of payload
for hex dump.

Removed check for config item key of "MSP", as the key is the MSP id.

Adding HashingAlgorithm configuration item and defaulted to SHAKE256.

Change-Id: I885d3e163c44782b182bce73e5e169d351e206ad
Signed-off-by: jeffgarratt <garratt.jeff@gmail.com>