Data edit api

[sahithyaravi]

As discussed, this api can edit some meta-features of the dataset:
List of meta-features can be edited/ updated via data_edit API call,

1. description
2. creator
3. contributor
4. collection_date
5. language
6. citation
7. original_data_url
8. paper_url

These meta-features/ data will just need to call create_dataset api and create a new version: (python api)

1. attributes
2. data - the data itself
3. default_target_attribute
4. ignore_attribute
5. row_id_attribute

After the data_edit API is ready, I can create a single python API to handle both of these cases.
Based on the arguments (None or otherwise). We can either create a new dataset or call the data_edit API.

How to test this API?

Create a post request:
Request URL: localhost/api/v1/json/data/edit
Request body: Specify the data_id and atleast one of the 7 fields to edit as an XML

example data.xml:

<oml:data_edit_parameters xmlns:oml="http://openml.org/openml">
<oml:description> Testing description changes </oml:description>
<oml:creator> sahi </oml:creator>
<oml:contributor> Joaquin Vanschoren</oml:contributor>
<oml:collection_date> 2020 </oml:collection_date>
<oml:language>English</oml:language>
<oml:citation>xxx</oml:citation>
<oml:original_data_url>http://openml.org/d/1</oml:original_data_url>
<oml:paper_url>http://openml.org/d/1</oml:paper_url>
</oml:data_edit_parameters>

[janvanrijn]

Code looking good @sahithyaravi1493, I could only find some small things that should be improved.

[janvanrijn]

For consistency, it would be great if we would solve this with a XML (and new XSD) as well.

[janvanrijn]

For consistency, the API error codes are setup in such a way that we have a "range" of error codes per error function. It would be good to claim the range 1060 - 1069 for this function, and duplicate all error messages that are now reused.

[janvanrijn]

please use Codeigniter official Query for this (it's $this->Dataset->update or something like that)

[janvanrijn]

please also 'catch' the return value of that function (boolean) and handle it if there is an error

[janvanrijn]

For consistency (with upload/delete fns), I would suggest to create a 'data-edit' and to only show data id

[janvanrijn]

Thanks for making this PR! It looks great.