Add flags for Keyrock permission

[fisuda]

Proposed changes

This PR adds flags for Keyrock permission.

ngsi applications permissions create
ngsi applications permissions update

   --regex, -R                      use resource with regex (default: false)
   --serviceHeader VALUE, -S VALUE  set authorization service header

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Update only documentation, not any source code.

Checklist

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• I have read the CONTRIBUTING doc
• I have signed the CLA
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

Further comments

N/A

[coveralls]

coverage: 100.0%. remained the same when pulling 7ccd191 on fisuda:feature/permission_flags into b6c7be6 on lets-fiware:main.