Document HTTP queries for lib microservice about dtaas

[lindot11]

I have documented the HTTP queries for these docs and made a pull request

• docs/admin/servers/lib/LIB-MS.md
• servers/lib/README.md

Not sure if I can do the last one, because my computer doesn't have the capacity to install the DTaaS application and try the HTTP queries as user.

• docs/user/servers/lib/LIB-MS.md

[lindot11]

Regarding the json prettifying issue.

{
   "query":"query { listDirectory(path: \"user1\") { repository { tree { blobs { edges { node { name type } } } trees { edges { node { name type } } } } } } }"
}

The query value is one graphql query string, since the value in json should be a single line.
Alternatively I thought of changing the request body like below so it's easier to identify where to change the path variable in the query.

{
   "query": "query ($path: String!) { listDirectory(path: $path) { repository { tree { blobs { edges { node { name type } } } trees { edges { node { name type } } } } } } }",
   "variables": {
      "path": "user1"
   }
}

[prasadtalasila]

fixed in PR #113 and #115