Upgrade of maven plugins (#951)

* Upgrade maven plugins

* Upgrade maven plugins

Some general code cleanup was necessary due to upgrade of PMD and checkstyle.

Also needed to add Junit 4 as a dependency due to Mockito.timout issue found here:
https://github.com/mockito/mockito/issues/152

naked-objects/pom.xml

@@ -90,31 +90,9 @@
 						</execution>
 					</executions>
 				</plugin>
-				<plugin>
-					<groupId>org.apache.maven.plugins</groupId>
-					<artifactId>maven-compiler-plugin</artifactId>
-					<version>3.1</version>
-					<configuration>
-						<source>1.8</source>
-						<target>1.8</target>
-						<compilerArgument>-parameters</compilerArgument>
-					</configuration>
-					<executions>
-						<execution>
-							<id>source</id>
-							<phase>compile</phase>
-						</execution>
-						<execution>
-							<id>test</id>
-							<phase>test-compile</phase>
-						</execution>
-					</executions>
-				</plugin>
-
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-surefire-plugin</artifactId>
-					<version>2.16</version>
 					<configuration>
 						<includes>
 							<include>**/*Test.java</include>