Files: Json responses have newline character in response for build field

[dvernon-tacc]

As an example, here is the result of readycheck. Note the build field ends with \n. This is present in all responses from files, not just readycheck:

`HTTP/1.1 200 OK
Access-Control-Allow-Credentials: true
Access-Control-Allow-Headers: Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Mx-ReqToken,X-Requested-With,x-tapis-token
Access-Control-Allow-Methods: GET, POST, PUT, PATCH, DELETE, OPTIONS
Access-Control-Allow-Origin: *
Connection: keep-alive
Content-Length: 223
Content-Type: application/json
Date: Thu, 01 Aug 2024 19:51:51 GMT
Server: nginx/1.23.3
Strict-Transport-Security: max-age=63072000

{
"build": "2024-07-19T20:26:22Z\n",
"commit": "6e71ac6d",
"message": "TAPIS_READY Readiness check received by Files Service.",
"metadata": null,
"result": "Ready check passed. Count: 4",
"status": "success",
"version": "1.6.4-6e71ac6d"
}
`