removed classpath from git and eclipse.prefs and changed pom to update h2 database because of vulnerability in old version + changed scope because test scope lead to build failures in vscode

'principal' cannot be found on object of type 'java.lang.Object[]' -
maybe not public or not valid"

This needs a lot more work, but at least runs.

Remove search by type. This had to be done because
type was changed to learningResourceType, which is
a free string and no longer an enum.
String search for type could be added in the future.

Disable suggestions for format. This was done because
in the current version format is no longer a list
but a single string. There are problems with that, so
this might change again.

Lots of tests fail.