Testing for Connecting TF Resources

[sdischer-sap]

Context

During the work on #53 we noticed that the code for connecting a tf resource to a ProviderConfig isn't being tested right now.
This refers to the two methods called TerraformSetupBuilder and TerraformSetupBuilderNoTracking (see here). While the first one is being used for any upjetted resource type the second one is being used specifically within ServiceManager and CloudManagement, where we have a native controller then internally delegates to a tf resource.
It probably makes sense to also combine those methods while we are at it. You can refer to similar tests like the ones for the rolecollection resource here.

Expected Outcome

• TerraformSetupBuilder and TerraformSetupBuilderNoTracking are covered by unittests