Adding DML SQL script with demo data upon DB init.

pom.xml

@@ -27,6 +27,30 @@
           <target>1.8</target>
         </configuration>
       </plugin>
+      <!-- Updating Git Submodule before package -->
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>exec-maven-plugin</artifactId>
+        <inherited>false</inherited> <!-- only execute these in the parent -->
+        <executions>
+          <execution>
+            <id>git submodule update</id>
+            <phase>initialize</phase>
+            <configuration>
+              <executable>git</executable>
+              <arguments>
+                <argument>submodule</argument>
+                <argument>update</argument>
+                <argument>--recursive</argument>
+                <argument>--remote</argument>
+              </arguments>
+            </configuration>
+            <goals>
+              <goal>exec</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
   </build>