[jcustenborder#212] fix failing tests when running in non-UTC timezone

Author: MarcusLinkeHermes

pom.xml

@@ -237,6 +237,11 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
                 <version>2.19.1</version>
+                <configuration>
+                    <systemPropertyVariables>
+                        <user.timezone>UTC</user.timezone>
+                    </systemPropertyVariables>
+                </configuration>
                 <dependencies>
                     <dependency>
                         <groupId>org.junit.platform</groupId>