Variable CONCURRENCY not used in the replicate-couchdb-cluster/docker/replicate.sh

[jaric85]

Variable CONCURRENCY has been prepared to be used in replicate-couchdb-cluster/docker/replicate.sh but never actually used
if [ "$CONCURRENCY" != "" ]; then
CONCURRENCY="-c $CONCURRENCY"
fi

/usr/local/bin/replicate-couchdb-cluster -s $SOURCE -t $TARGET $CONCURRENY $SKIP $USE_TARGET_API $VERBOSE $DEBUG

Needed fix on https://github.com/redgeoff/replicate-couchdb-cluster/blob/master/docker/replicate.sh#L41C69-L41C79