PPI tests for EBAS failing

[lewisblake]

Describe the bug Please provide a clear and concise description of what the bug is.

Tests on PPI are failing because the testdata_minimal data set and is not the latest version. Long term: make the testdata_minimal come from MyPyaerocom, not shared resource

• Pyaerocom version: v0.20.dev1
• Computing platform: PPI
• Configuration file (if applicable): NA
• Error message (if applicable): NA

To Reproduce Steps to reproduce the behavior:

1. pytest .

[jgriesfeller]

fixed via #1230