Use abstract representation for actions from retest-model instead of Selenium types

[tdauth]

The legacy code provided the interface Action and the abstract class AbstractAction which reimplemented equals and hashCode by comparing ActionIdentifyingAttributes. This is important when the action is used as key type for maps or in sets etc.

As long as there is no abstract representation, the legacy API could be used:

<dependency>
			<groupId>de.retest</groupId>
			<artifactId>retest</artifactId>
			<version>3.0.1</version>
			<exclusions>
				<exclusion>
					<groupId>com.google.guava</groupId>
					<artifactId>guava</artifactId>
				</exclusion>
			</exclusions>
</dependency>

See de.retest.ui.actions.AbstractAction.