Fix openshift unit tests errors related to hamcrest

Current openshift builds report hamcrest CNFE : 

Error Details org/hamcrest/SelfDescribing
Stack Trace java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing at org.jboss.tools.openshift.test.core.server.debug.OpenShiftDebugModeTest.shouldAddContainerDebugPortGivenNoPortExistsYet(OpenShiftDebugModeTest.java:401) Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing cannot be found by org.mockito.mockito-core_4.8.1.v20221103-2317 at org.jboss.tools.openshift.test.core.server.debug.OpenShiftDebugModeTest.shouldAddContainerDebugPortGivenNoPortExistsYet(OpenShiftDebugModeTest.java:401)

Error Details Missing method call for verify(mock) here: -> at org.jboss.tools.openshift.internal.ui.models.AbstractOpenshiftUIModel.lambda$0(AbstractOpenshiftUIModel.java:68) Example of correct verification: verify(mock).doSomething() Also, this error might show up because you verify either of: final/private/equals()/hashCode() methods. Those methods cannot be stubbed/verified. Mocking methods declared on non-public parent classes is not supported.
Stack Trace org.mockito.exceptions.misusing.UnfinishedVerificationException: Missing method call for verify(mock) here: -> at org.jboss.tools.openshift.internal.ui.models.AbstractOpenshiftUIModel.lambda$0(AbstractOpenshiftUIModel.java:68) Example of correct verification: verify(mock).doSomething() Also, this error might show up because you verify either of: final/private/equals()/hashCode() methods. Those methods cannot be stubbed/verified. Mocking methods declared on non-public parent classes is not supported.