HH-41290 concurrent limit for http rpc server
[maven-release-plugin] prepare release http-rpc-1.16.1
[maven-release-plugin] prepare for next development iteration
HH-41290 use 503 instead of 429, coz it's server problem, not client
[maven-release-plugin] prepare release http-rpc-1.16.2
[maven-release-plugin] prepare for next development iteration
HH-41290 add headers to Http request/response
[maven-release-plugin] prepare release http-rpc-1.16.3
[maven-release-plugin] prepare for next development iteration