Fix: soften mad related constraints

[tom-rm-meyer-ISST]

Description

During preparation of the integration test, the postman collection failed for two constraints:

• the following edcUrl in partner was not applicable: "https://isst-edc.int.demo.catena-x.net" (realized that I should configure it with /api/v1/dsp but nethertheless this might cause issues with other partners' ingress configuration)
• the names were not able to contain "." which would prevent e.g. the name "Supplier Inc."
• there was a transient issue that the material stock didn't search for the material during creation to ensure integrity

Additionally I created Test Classes for the patterns in MAD.

Pre-review checks

Please ensure to do as many of the following checks as possible, before asking for committer review:

• DEPENDENCIES are up-to-date. Dash license tool. Committers can open IP issues for restricted libs.
• Copyright and license header are present on all affected files

[mhellmeier]

Please check the DEPENDENCIES_FRONTEND file which seems to be outdated based on the pipeline.

[mhellmeier]

The dependencies problems are fixed due to a problem with the Dash tool.