[D2S] HC Proxy: HTTP Non-persistent connection support

[D2S] HC Proxy: HTTP Non-persistent connection support

Http request handling processes:
1. SslContext: for TLS connection
2. HttpRequestDecoder: netty-http-codec
3. HttpLogHandler: for Http log
4. HCProxyHandler: to translate HTTP to CoAP
5. HttpAuthHandler: for Authorization check
6. NonPersistentPacketReceiver:
   to hand over a request msg to a proper resource (server)
Note: Resource-manager will broker the received request
      to correspoding resource according to url path.

Change-Id: Ia78a6cbbcd47ace81b074010da194045ac12a8fc
Signed-off-by: hwa.chung <hwa.chung@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/13247
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Yeonghun Nam <yeonghun.nam@samsung.com>
Reviewed-by: Jee Hyeok Kim <jihyeok13.kim@samsung.com>