Fixes to selectors and added tests.

analysis/build.gradle

...ava/org/oceandsl/analysis/graph/selector/AllSelector.java

...va/org/oceandsl/analysis/graph/selector/DiffSelector.java

...g/oceandsl/analysis/graph/selector/IntersectSelector.java

...rg/oceandsl/analysis/graph/selector/SubtractSelector.java

...is/architecture/ArchitectureModelManagementUtilsTest.java

...ceandsl/analysis/architecture/ArchitectureModelUtils.java

...alysis/architecture/stages/CountUniqueCallsStageTest.java

...org/oceandsl/analysis/graph/selector/AllSelectorTest.java

...rg/oceandsl/analysis/graph/selector/DiffSelectorTest.java

...eandsl/analysis/graph/selector/IntersectSelectorTest.java

...ceandsl/analysis/graph/selector/SubtractSelectorTest.java

build.gradle

tools/sar/build.gradle

...ar/stages/dataflow/CountUniqueDataflowCallsStageTest.java