Gnocchi Resource-type UPDATE is not working

[Arjun G]

We are facing issue during setting of "Content-Type" while making request in server side(Openstack pike machine) for Gnocchi Resource-type updation for REST API calls only. Below are the stack-trace for reference.

17:37:54,975 INFO OpenstackTests:1045 - Resource Type name :: TestResource
  INFO | 2018-04-06 17:37:54,975 | OpenstackTests.java | performGnocchiDeleteSamples | 1045 | Resource Type name :: TestResource
17:37:55,010 DEBUG HttpExecutor:52 - Executing Request with content-type: http://ubuntu16:8041/v1 -> /resource_type/TestResource -> application/json-patch+json
DEBUG | 2018-04-06 17:37:55,010 | HttpExecutor.java | execute | 52 | Executing Request with content-type: http://ubuntu16:8041/v1 -> /resource_type/TestResource -> application/json-patch+json
Apr 06, 2018 5:37:55 PM org.glassfish.jersey.filter.LoggingFilter log
INFO: 1 * Sending client request on thread main
1 > PATCH http://ubuntu16:8041/v1/resource_type/TestResource
1 > Accept: application/json
1 > Content-Type: application/json
1 > User-Agent: ADARA CloudFabric
1 > X-Auth-Token: gAAAAABax2HICoTmjgn5mchWaX1Gk6YoPflnxn0ZPCav4VK3E-x14cdmE6W8RtacwbJaQiaM4kxLlWX-3WmuPmi9pi1lmYY87l9y_X42_ZAncRj4j8y2NVanM9l3x5VflpwwNUDriEseI_zCLacVMnjAhG69OEuoWeRT_45ORK-1ZBrhTWRlQO9pPP0yvyv6-Y52u4j2AkOe
[{"op":"remove","path":"/attributes/prefix"},{"op":"add","path":"/attributes/suffix","value":{"type":"bool","required":true,"max_length":6}}]

Apr 06, 2018 5:37:55 PM org.glassfish.jersey.filter.LoggingFilter log
INFO: 1 * Client response received on thread main
1 < 415
1 < Connection: Keep-Alive
1 < Content-Length: 67
1 < Content-Type: application/json
1 < Date: Fri, 06 Apr 2018 12:02:18 GMT
1 < Keep-Alive: timeout=5, max=99
1 < Server: Apache/2.4.18 (Ubuntu)
{"code": 415, "description": "", "title": "Unsupported Media Type"}

Content-type is getting over-ridden(application/json) in OS server side, though we are sending properly as expected (application/json-patch+json). We end up seeing "Unsupported Media Type" in the response.

Need solution for this as soon as possible. Gnocchi 3.3.1 version being used for testing.