SOAP-271 - Update maven plugin for 4.5.2

* Add exclusions for the Maven plugin
* Rename the Maven plugin artifact name (SOAP-92)
* Minor clean up
change the test project and pom file to run the maven plugin tester successfully
Merge branch 'maven-plugin-SOAP-599' into next

Conflict solved by using the maven-plugin-SOAP-599 version

Conflicts:
	soapui-maven-plugin/pom.xml