Change tests random number generator to /dev/urandom

This fixes a big performance issue with random number generation with more recent kernels and java versions in linux

pom.xml

@@ -963,6 +963,9 @@
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-failsafe-plugin</artifactId>
           <version>2.18.1</version>
+          <configuration>
+              <argLine>-Djava.security.egd=file:/dev/./urandom</argLine>
+          </configuration>
         </plugin>
       </plugins>
     </pluginManagement>

server/pom.xml

@@ -174,7 +174,7 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <argLine>-Xmx1024m</argLine>
+          <argLine>-Xmx1024m -Djava.security.egd=file:/dev/./urandom</argLine>
           <excludes>
             <exclude>%regex[.*[0-9]*To[0-9]*.*Test.*]</exclude>
             <exclude>com/cloud/upgrade/AdvanceZone223To224UpgradeTest</exclude>