Run tests in parallel for specified modules

 * running tests in multiple forks results
   in significant speed-up

 * only some modules are able to run tests in
   parallel, others like -jpa would need to be
   fixed first to not depend on each other.

 * it also makes most sense for modules which build
   time is high (most of the time is spent in tests).

drools-compiler/pom.xml

@@ -14,6 +14,10 @@
 
   <name>Drools :: Compiler</name>
 
+  <properties>
+    <surefire.forkCount>2</surefire.forkCount>
+  </properties>
+
   <dependencies>
     <!-- Internal dependencies -->
     <dependency>

drools-core/pom.xml

@@ -14,6 +14,10 @@
 
   <name>Drools :: Core</name>
 
+  <properties>
+    <surefire.forkCount>2</surefire.forkCount>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.osgi</groupId>

drools-pmml/pom.xml

@@ -32,6 +32,10 @@
   <name>Drools :: PMML - Compiler </name>
   <description>Support for PMML-Encoded Predictive Models</description>
 
+  <properties>
+    <surefire.forkCount>2</surefire.forkCount>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.drools</groupId>

drools-reteoo/pom.xml

@@ -117,4 +117,4 @@
       </plugin>
     </plugins>
   </build>
-</project>
+</project>

pom.xml

@@ -20,6 +20,10 @@
     Drools Expert is the rule engine and Drools Fusion does complex event processing (CEP).
   </description>
 
+  <properties>
+    <surefire.forkCount>1</surefire.forkCount>
+  </properties>
+
   <repositories>
     <!-- Bootstrap repository to locate the parent pom when the parent pom has not been build locally. -->
     <repository>
@@ -66,6 +70,21 @@
     <module>knowledge-api-legacy5-adapter</module>
   </modules>
 
+  <build>
+    <pluginManagement>
+      <plugins>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <configuration>
+            <forkCount>${surefire.forkCount}</forkCount>
+            <reuseForks>true</reuseForks>
+          </configuration>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+
   <profiles>
     <profile>
       <id>fullProfile</id>