SPARK-6433 -002; indentation & delegate plugin version to parent

pom.xml

@@ -158,7 +158,6 @@
     <fasterxml.jackson.version>2.4.4</fasterxml.jackson.version>
     <snappy.version>1.1.1.6</snappy.version>
     <netlib.java.version>1.1.2</netlib.java.version>
-    <maven-jar-plugin.version>2.6</maven-jar-plugin.version>
 
     <!--
       Dependency scopes that can be overridden by enabling certain profiles. These profiles are
@@ -1478,7 +1477,6 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-jar-plugin</artifactId>
-        <version>${maven-jar-plugin.version}</version>
         <configuration>
           <!-- Configuration of the archiver -->
           <archive>
@@ -1493,25 +1491,25 @@
           </archive>
         </configuration>
         <executions>
-        <execution>
-          <id>prepare-jar</id>
-          <phase>prepare-package</phase>
-          <goals>
-            <goal>jar</goal>
-          </goals>
-        </execution>
-        <execution>
-          <id>prepare-test-jar</id>
-          <phase>prepare-package</phase>
-          <goals>
-            <goal>test-jar</goal>
-          </goals>
-          <configuration>
-            <excludes>
-              <exclude>log4j.properties</exclude>
-            </excludes>
-          </configuration>
-        </execution>
+          <execution>
+            <id>prepare-jar</id>
+            <phase>prepare-package</phase>
+            <goals>
+              <goal>jar</goal>
+            </goals>
+          </execution>
+          <execution>
+            <id>prepare-test-jar</id>
+            <phase>prepare-package</phase>
+            <goals>
+              <goal>test-jar</goal>
+            </goals>
+            <configuration>
+              <excludes>
+                <exclude>log4j.properties</exclude>
+              </excludes>
+            </configuration>
+          </execution>
         </executions>
       </plugin>
     </plugins>