Accept Set params; return HashSet values

[berezovskyi]

Closes #15

[berezovskyi]

There are two files that get regenerated and I have ignored those changes from the diff:

[berezovskyi]

@jadelkhoury here is a link w/o whitespace changes https://github.com/eclipse/lyo.designer/pull/16/files?utf8=%E2%9C%93&diff=unified&w=1

[berezovskyi]

Maybe hold off on merging this right now, I just got a funny new exception at runtime:

scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | Caused by: org.eclipse.lyo.oslc4j.core.exception.OslcCoreMissingSetMethodException: OSLC011: Missing corresponding set method for method getAdding of class eu.scott.warehouse.domains.pddl.Step
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at org.eclipse.lyo.oslc4j.core.model.ResourceShapeFactory.validateSetMethodExists(ResourceShapeFactory.java:378)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at org.eclipse.lyo.oslc4j.core.model.ResourceShapeFactory.createResourceShape(ResourceShapeFactory.java:156)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at org.eclipse.lyo.oslc4j.core.model.ResourceShapeFactory.createResourceShape(ResourceShapeFactory.java:110)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at org.eclipse.lyo.oslc4j.application.OslcResourceShapeResource.<init>(OslcResourceShapeResource.java:65)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at org.eclipse.lyo.oslc4j.application.OslcWinkApplication.<init>(OslcWinkApplication.java:56)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at se.ericsson.cf.scott.sandbox.whc.servlet.Application.<init>(Application.java:132)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at org.apache.wink.common.internal.lifecycle.CreationUtils.createObject(CreationUtils.java:66)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	... 44 more
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | Caused by: java.lang.NoSuchMethodException: eu.scott.warehouse.domains.pddl.Step.setAdding(java.util.HashSet)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at java.lang.Class.getMethod(Class.java:1786)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	at org.eclipse.lyo.oslc4j.core.model.ResourceShapeFactory.validateSetMethodExists(ResourceShapeFactory.java:376)
scott_sandbox-whc.1.ukzixyfv0ru4@linuxkit-025000000001    | 	... 54 more

Apparently, use of HashSets is hardcoded in ResourceShapeFactory.