Fix for GitHub Issues 220 and 222

[juileetikekar]

Description

This PR includes fixes for GitHub Issues #220 and #222.

[a] If a V2 AASX file consists of a concept description with empty IsCaseOf reference, V3 conversion and thereby file APIs fail due to constraints in xml de/serializations from aas-core-sdk. Thus, if V1 or V2 AASX files have such empty IsCaseOf reference, there are skipped from the conversion.

[b] Additionally, the server was showing a few command line arguments (-h, -p, -rest, -https, -external-rest ), which are not supported anymore. Hence, with this PR such arguments are removed.

Type of change

Please delete options that are not relevant.

• Bug fix (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)
• This change requires a documentation update

How Has This Been Tested?

[a] was successfully tested with GetAASXFile Api
[b] was tested with commandline execution of server with help option.

Screenshots (if appropriate):

Checklist:

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works