Merge branch 'copyNode'

src/main/java/it/inaf/oats/vospace/AbstractNodeService.java

src/main/java/it/inaf/oats/vospace/CopyService.java

src/main/java/it/inaf/oats/vospace/FileServiceClient.java

src/main/java/it/inaf/oats/vospace/JobService.java

src/main/java/it/inaf/oats/vospace/MoveService.java

src/main/java/it/inaf/oats/vospace/persistence/NodeDAO.java

src/test/java/it/inaf/oats/vospace/CopyServiceTest.java

src/test/java/it/inaf/oats/vospace/MoveServiceTest.java

...test/java/it/inaf/oats/vospace/NodeBranchServiceTest.java

...st/java/it/inaf/oats/vospace/persistence/NodeDAOTest.java

src/test/resources/test-data.sql