extended EnumEditor for generic enumeration types
exception fixes; enumeration editor/valueprovider implementation; generic fixes; removed unused imports
Merge branch 'sprint1' of https://github.com/TestingTechnologies/PlayCustomParameters into sprint1

Conflicts:
	ttworkbench.play.parameters.ipv6/src/ttworkbench/play/parameters/ipv6/composer/MacWidgetComposer.java
	ttworkbench.play.parameters.ipv6/src/ttworkbench/play/parameters/ipv6/editors/macaddr/MacAddressEditor.java
	ttworkbench.play.parameters.ipv6/src/ttworkbench/play/parameters/ipv6/editors/octet/OctetEditor.java
	ttworkbench.play.parameters.ipv6/src/ttworkbench/play/parameters/ipv6/editors/verification/widgets/VerifyingCombo.java
	ttworkbench.play.parameters.ipv6/src/ttworkbench/play/parameters/ipv6/editors/verification/widgets/VerifyingText.java
	ttworkbench.play.parameters.ipv6/src/ttworkbench/play/parameters/ipv6/valueproviders/MacValueProvider.java