Improve license extraction, detection spdx and consolidation

[juanjemdIos]

We need to review and improve how licenses are extracted and handled across the system.
• Licenses should be consolidated, as there may be duplicates or inconsistencies from different sources.
• The extraction process should be reviewed, since the license identifier is sometimes incorrect (ej: "identifier": "https://spdx.org/licenses/https://spdx.org/licenses/MIT",)
• The SPDX detector does not always work properly with file dump inputs, which can lead to missing or wrong license information. spdx_id is missing. ej: " {
"result": {
"value": "Copyright (c) 2018 The Python Packaging Authority\n\n,..... "
"type": "File_dump"
},
"confidence": 1,
"technique": "file_exploration",
"source": "https://raw.githubusercontent.com/KnowledgeCaptureAndDiscovery/somef/master/LICENSE"
},

[dgarijo]

Additional issues:

• Identifier from codemeta has a double spdx URL
• URL is extracted as spdx id in codemeta, instead of the actual id.