Replace testsuite config files by OSyncPluginConfig calls

[dgollub]

To avoid porting/update effort of the testsuite, we should make the testcases independent of configuration schemas. Replace configuration files in ./tests/data/**/*.conf with OSyncPluginConfig calls in testcases.

[dgollub]

Test configuration files got temporarily ported to the new layout with r3390. So the testsuite is usable again and we can track regression. This task is still valid. Those test configuration files should get replaced by test-helper-functions. This should shrink maintaince-overhead in keeping all those redundant configuration up to date.

[dgollub]

With r3354 a helper function, to generate simple configs, got introduced: simple_plugin_config

[dgollub]

This is a nice to have - for timing reason i ported all configs to the new OSyncPluginConfig. This task is still valid - volunteers?

Btw. don't get rid of all test config files - we need some for testing the parser ;)

[dgollub]

For timing reason this is not relevant for 0.40. Postponing...