remove the /usr/local/zstack folder after the zstack 1.1 installation, then install the mevoco 1.1, it failed to setup cassandra_db
remove the /usr/local/zstack folder after the zstack 1.1 installation,
then install the mevoco 1.1, it failed to setup cassandra_db

fix https://github.com/zxwing/premium/issues/137

zstackio/zstack-utility,mingjian2049/zstack-utility,live4thee/zstack-utility,live4thee/zstack-utility,zstackio/zstack-utility,zstackorg/zstack-utility,mrwangxc/zstack-utility,mingjian2049/zstack-utility,zstackio/zstack-utility,mrwangxc/zstack-utility,mingjian2049/zstack-utility,zstackorg/zstack-utility,mrwangxc/zstack-utility,live4thee/zstack-utility,zstackorg/zstack-utility