tomcat-instance: default rng set to /dev/urandom

tomcat-instance/templates/env.j2

@@ -2,5 +2,6 @@
 # Xmx Max memory allocated to instance.
 # Xms Allocated memory at startup.
 # XX:MaxPermSize Memory allocated to internal objects.
+# Djava.security.egd -> https://wiki.apache.org/tomcat/HowTo/FasterStartUp#Entropy_Source
 JAVA_HOME="{{ tomcat_instance_java_path }}"
-JAVA_OPTS="-server -Xmx{{ tomcat_instance_ram }}m -Xms{{ tomcat_instance_ram }}m -XX:MaxPermSize={{ tomcat_instance_mps }}m -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSPermGenSweepingEnabled -XX:+CMSClassUnloadingEnabled -Xverify:none"
+JAVA_OPTS="-server -Xmx{{ tomcat_instance_ram }}m -Xms{{ tomcat_instance_ram }}m -XX:MaxPermSize={{ tomcat_instance_mps }}m -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSPermGenSweepingEnabled -XX:+CMSClassUnloadingEnabled -Xverify:none -Djava.security.egd=file:/dev/./urandom"