Create cube feature is needed

[rayween]

• Desc:

just like #1 , we need a new feature to create cube through kylinpy

• Typical Scenario:

we get the cube_desc/kylin_sales_model.json, generated by the command
$KYLIN_HOME/bin/metastore.sh backup
and we want to use the kylinpy CLI like this:
kylinpy -h kap.kapdemo.com -P 7070 -u ADMIN -p KYLIN --project learn_kylin --api1 --debug -f Model_desc/kylin_sales_model.json cube
and as a result, we want a new cube built in kylin. YOU MAY THINK THIS IS AN ANOTHER WAY TO CLONE A CUBE