Update pom.xml

Change the pom.xml for the JDBC demo project so that users can directly compile and package an executable jar with all the dependencies.

tests/examples/JDBC/JDBCDemo/pom.xml

@@ -9,7 +9,45 @@
     <version>1.0-SNAPSHOT</version>
     <packaging>jar</packaging>
     <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-plugins</artifactId>
+                    <version>30</version>
+                </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-assembly-plugin</artifactId>
+                    <version>3.0.0</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <version>3.1.0</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <mainClass>TSDBSyncSample</mainClass>
+                        </manifest>
+                    </archive>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>make-assembly</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
@@ -28,6 +66,4 @@
             <version>1.0.0</version>
         </dependency>
     </dependencies>
-
-
-</project>
\ No newline at end of file
+</project>