Remove default surefire/failsafe exclusions to run nested tests by default.

Surefire and Failsafe plugins by default exclude nested classes.
This overwrites these excludes with empty ones, thus enabling execution of nested classes.

See https://maven.apache.org/surefire/maven-surefire-plugin/test-mojo.html\#excludes

Closes #2119

parent/pom.xml

@@ -1240,6 +1240,7 @@
 					<includes>
 						<include>**/*Tests.java</include>
 					</includes>
+					<excludes><exclude/></excludes>
 				</configuration>
 			</plugin>
 
@@ -1249,6 +1250,7 @@
 				<configuration>
 					<useFile>false</useFile>
 					<argLine>-Xverify:all</argLine>
+					<excludes><exclude/></excludes>
 				</configuration>
 			</plugin>