streamchain

Chaincode event handling was intended to pick up LSCC
chaincode updates, but was also picking up LSCC
chaincode collection updates.

This change ignores chaincode collection updates.

Additionally, related chaincode event debug is improved.

Note that two copies of Collecion-specific constants
were found.  The unused duplicate is removed from lscc.

Change-Id: I8d7c4320d757a7d3327bd2bb22bba0b653febc23
Signed-off-by: David Enyeart <enyeart@us.ibm.com>