D-Net

[Trunk | Monitor Service]: uoa-authorization-library dependency added:
1. pom.xml: Added dependencies for spring security and for uoa-authorization-library | [Bug fix] spring boot version set to 1.5.8 (it was accidentally set to 1.5.18 and library was not compatible)....

[Trunk | Monitor Service]:
1. trunk/src/test/java/eu/dnetlib/uoamonitorservice: New folders for tests.
2. ExceptionsHandler.java: Replace "log.debug" with "log.error".
3. Stakeholder.java: Field 'description' and getter/ setter methods added.
4. Topic.java: Field 'icon' and getter/ setter methods added | In method "copyFromDefault()", set "isActive" and "isPublic" fields of new Topic same as the values from default Topic....

1. pom.xml: Add dependency for "uoa-help-texts-library" (will be renamed).
2. UoaMonitorServiceApplication.java: Add @PropertySource path used in dl170.
3. MongoConnection.java: @EnableMongoRepositories not only from: eu.dnetlib.uoamonitorservice.dao, but also: eu.dnetlib.uoahelptexts.dao....

1. Schema changes: Move each entity on its own collection - each entity keeps ids for its sub-entities.
2. New controllers for each entity: TopicController.java, CategoryController.java, SubCategoryController.java, IndicatorController.java.
3. New DAOs for each entity: TopicDAO.java, MongoDBTopicDAO.java, CategoryDAO.java, MongoDBCategoryDAO.java, SubCategoryDAO.java, MongoDBSubCategoryDAO.java....

Initial commit for monitor-service.