Revert "change kairosdb log level to WARN"
Revert "change kairosdb log level to WARN"

This reverts commit 6c68d8f54fb8f9c55d6523858af853cbd0e0de50.

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