[pulsar-proxy] add proxyLogLevel into config file (#6948)
[pulsar-proxy] add proxyLogLevel into config file (#6948)

Motivation
Add proxyLogLevel config into proxy config file.
yahoo/pulsar,yahoo/pulsar,merlimat/pulsar,yahoo/pulsar,massakam/pulsar,massakam/pulsar,massakam/pulsar,yahoo/pulsar,massakam/pulsar,merlimat/pulsar,yahoo/pulsar,merlimat/pulsar,yahoo/pulsar,massakam/pulsar,merlimat/pulsar,merlimat/pulsar,massakam/pulsar,merlimat/pulsar