[FAB-3684] Default $CHANNEL_NAME is not set
[FAB-3684] Default $CHANNEL_NAME is not set

Default $CHANNEL_NAME is not set in e2e_cli/generateArtifacts.sh
This patch fixes the script to set "mychannel" as defalut channel.

Change-Id: Id6dbf33723b7f433463fcee9f5bb265a20736dd1
Signed-off-by: Yuki Kondo <77561f1dfca6e25a5bb8ad37bc6f33030d4f6882@hal.hitachi.com>

kchristidis/fabric,stemlending/fabric,Ryan--Yang/fabric,tkuhrt/fabric,chrisguoado/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,thakkarparth007/fabric,ckeyer/fabric,ckeyer/fabric,Ryan--Yang/fabric,xixuejia/fabric,thakkarparth007/fabric,ckeyer/fabric,mqshen/fabric,phariel/fabric,lukehuangch/fabric,blockc/fabric,thakkarparth007/fabric,kchristidis/fabric,Ryan--Yang/fabric,manish-sethi/fabric,stemlending/fabric,manish-sethi/fabric-sidedb,ibmmark/fabric,xixuejia/fabric,manish-sethi/fabric,ibmmark/fabric,Ryan--Yang/fabric,manish-sethi/fabric-sidedb,phariel/fabric,cophey/fabric,lukehuangch/fabric,phariel/fabric,chrisguoado/fabric,mffrench/fabric,binhn/fabric,muralisrini/fabric,magg/fabric,tkuhrt/fabric,tkuhrt/fabric,lukehuangch/fabric,mqshen/fabric,mffrench/fabric,muralisrini/fabric,thakkarparth007/fabric,xixuejia/fabric,magg/fabric,binhn/fabric,cophey/fabric,kchristidis/fabric,mffrench/fabric,magg/fabric,ibmmark/fabric,lukehuangch/fabric,muralisrini/fabric,Ryan--Yang/fabric,chrisguoado/fabric,mqshen/fabric,phariel/fabric,magg/fabric,ckeyer/fabric,mffrench/fabric,lukehuangch/fabric,ckeyer/fabric,mqshen/fabric,ckeyer/fabric,cophey/fabric,ckeyer/fabric,jimthematrix/fabric,blockc/fabric,chrisguoado/fabric,thakkarparth007/fabric,kchristidis/fabric,thakkarparth007/fabric,hyperledger/fabric,phariel/fabric,blockc/fabric,chrisguoado/fabric,ibmmark/fabric,tkuhrt/fabric,cophey/fabric,magg/fabric,stemlending/fabric,manish-sethi/fabric-sidedb,Ryan--Yang/fabric,Ryan--Yang/fabric,stemlending/fabric,mqshen/fabric,chrisguoado/fabric,chrisguoado/fabric,magg/fabric,tkuhrt/fabric,blockc/fabric,lukehuangch/fabric,tkuhrt/fabric,ibmmark/fabric,mffrench/fabric,cophey/fabric,ibmmark/fabric,manish-sethi/fabric-sidedb,mffrench/fabric,tkuhrt/fabric,jimthematrix/fabric,phariel/fabric,cophey/fabric,kchristidis/fabric,phariel/fabric,cophey/fabric,ibmmark/fabric,mqshen/fabric,lukehuangch/fabric,kchristidis/fabric,mqshen/fabric,hyperledger/fabric,mffrench/fabric,kchristidis/fabric,blockc/fabric,blockc/fabric,binhn/fabric,blockc/fabric,manish-sethi/fabric-sidedb,magg/fabric,thakkarparth007/fabric