Merge pull request #28 from learning-layers/develop

First Deliverable
LAPPS-33 OpenID Connect Backend
After I excuse myself to touch a code who I did not write, I would
kindly suggest a similar way of querying as the one shown below. Reason
is that it is considered a good practise to abstract from the
lower-level operations as data-layer access. Moreover, ideally (but not
guaranteed J), we can then use the same 'business' methods with another
data provider implementation.
added authorization
Merge remote-tracking branch 'origin/oidc' into oidc

Conflicts:
	LAPPS-backend/src/main/java/de/rwth/dbis/layers/lapps/resource/UserResource.java
LAPPS-30
- DB schema changed
- AppInstanceEntity added
- AppPlatformEntity added
- AppPlatformFacde added
- AppFacadeTest extended further with new (modified) text cases
Merge pull request #41 from learning-layers/app_domain_model

LAPPS-30
Skeleton for Artifacts and Detail entities
LAPPS-30
- AppDetailEntity
- AppDetailTypeEntity
- AppDetailTypeFacade
- resp. changes in AppFacadeTest
LAPPS-30 AppArtifact and ArtifactType added
Merge remote-tracking branch 'origin/app_domain_model' into
app_domain_model

Conflicts:
	LAPPS-backend/src/main/java/de/rwth/dbis/layers/lapps/entity/AppEntity.java
	LAPPS-backend/src/main/resources/META-INF/persistence.xml
	LAPPS-backend/src/test/java/de/rwth/dbis/layers/lapps/domain/AppFacadeTest.java
	LAPPS-backend/src/test/resources/META-INF/persistence.xml
LAPPS-30
 - app artifact in test case
swagger integration
Merge pull request #42 from learning-layers/swagger_integration_3

swagger integration
LAPPS-34 backend sync with OIDC server
and 'fixed' tests
(we have to think about how to get a token to the backend for CI tests)
LAPPS-32 OIDC login prototype frontend
Merge pull request #43 from learning-layers/oidc

LAPPS-34 backend sync with OIDC server & LAPPS-32 prototype frontend
Delete npm-debug.log

..is already in gitignore on the frontend branch now, will be in the develop branches' gitignore shorly anyways:-)
LAPPS-29 - user update test
LAPPS-30
- new tests
- findByName in AppFacade