Add endpoint for modifying container info fields

[nagem]

Similar to #893, add endpoint to modify container info using set/delete/replace keywords.

POST /api/<container>/<container_id>/info

Format of request:

# set or delete required, can have both
{
	"set": {}, 
	"delete": []
}

• "set" is a non-empty map of key : value (values may be scalars or complex objects). All keys are added to the info key if they do not exist, or are replaced by the value if they do exist
• "delete" is a non-empty list of top level keys to be deleted. If key does not exist, request is ignored.

OR

{
	"replace": {}
}

• the value of the "replace" key will be set as the value of the info key for the file. It can be an empty map.

Example Requests

POST /api/acquisitions/5984d10adf01e2001433dde8/info HTTP/1.1
Content-Type: application/json

{
	"set": {
		"top_level_key": 123,
		"complex_object_key": {
			"a": 1,
			"b": 2
		}
	},
	"delete": ["keys", "to", "be", "removed"]
}

POST /api/acquisitions/5984d10adf01e2001433dde8/info HTTP/1.1
Content-Type: application/json

{
	"replace": {
		"notice": "this is a full replace of the info field"
	}
}

Breaking Changes

None

There will be a transition period where setting info through PUT /container_name/container_idwill still be allowed. It is expected that eventually all changes in info should go through these new endpoints.

@kofalt SDK related additive changes

Review Checklist

• Tests were added to cover all code changes
• Documentation was added / updated
• Code and tests follow standards in CONTRIBUTING.md

[codecov-io]

Codecov Report

Merging #988 into master will increase coverage by 0.03%.
The diff coverage is 97.22%.

@@            Coverage Diff             @@
##           master     #988      +/-   ##
==========================================
+ Coverage   90.39%   90.43%   +0.03%     
==========================================
  Files          50       50              
  Lines        6717     6753      +36     
==========================================
+ Hits         6072     6107      +35     
- Misses        645      646       +1

[nagem]

Tests are added. Feel free to start SDK development at any time @kofalt

[nagem]

Rebased, merging when CI is green.