Remove unnecessary surefire excludes

The [maven-surefire documentation](http://maven.apache.org/surefire/maven-surefire-plugin/examples/inclusion-exclusion.html) states:
```quote
By default, the Surefire Plugin will automatically include all test classes with the following wildcard patterns:

* "**/Test*.java" - includes all of its subdirectories and all Java filenames that start with "Test".
* "**/*Test.java" - includes all of its subdirectories and all Java filenames that end with "Test".
* "**/*Tests.java" - includes all of its subdirectories and all Java filenames that end with "Tests".
* "**/*TestCase.java" - includes all of its subdirectories and all Java filenames that end with "TestCase".
```

Therefore it's not required to exclude `(^IT.*|.*IT)\.java` tests in the configuration.
```xml

maven-surefire-plugin
2.

once
false





${project.build.directory}

```