Maven build: Add a pom for all test bundles

Issue-Ref: 3620
Issue-Url: https://af3-developer.fortiss.org/issues/3620


Signed-off-by: Alexander Diewald <diewald@fortiss.org>

pom.xml

+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
+  http://maven.apache.org/maven-v4_0_0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+  <artifactId>org.fortiss.af3.product.tests</artifactId>
+  <groupId>org.fortiss.af3.product.tests</groupId>
+  <packaging>pom</packaging>
+
+  <parent>
+    <groupId>org.fortiss.af3.tests</groupId>
+    <artifactId>org.fortiss.af3.tests</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+    <relativePath>../pom.xml</relativePath>
+  </parent>
+
+  <modules>
+    <module>org.fortiss.af3.phoenix.product.tests</module>
+  </modules>
+</project>
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