[FAB-5130] Invalid syntax in docker compose files
[FAB-5130] Invalid syntax in docker compose files

This patch set deletes unused docker-compose environment variables.
Now CouchDB section in docker-compose file uses DB_URL env variables.
But the variables are not used in CouchDB container.

Change-Id: I8e84255e1ea00498b787bdd4042cdb909a96667c
Signed-off-by: Nao Nishijima <ba12c351dbe96870a968dc0b0668a4a809432a94@hal.hitachi.com>

huangeason26/fabric-samples,huangeason26/fabric-samples,huangeason26/fabric-samples,huangeason26/fabric-samples