Align the version of the plugins with the parent pom

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/jci/trunk@1530591 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 6319bd9..95469ea 100644
--- a/pom.xml
+++ b/pom.xml
@@ -176,11 +176,6 @@
         <plugins>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
-                <artifactId>cobertura-maven-plugin</artifactId>
-                <version>2.2</version>
-            </plugin>
-            <plugin>
-                <groupId>org.codehaus.mojo</groupId>
                 <artifactId>findbugs-maven-plugin</artifactId>
                 <version>1.2</version>
             </plugin>
@@ -217,7 +212,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jxr-plugin</artifactId>
-                <version>2.1</version>
+                <version>${commons.jxr.version}</version>
                 <configuration>
                     <aggregate>true</aggregate>
                 </configuration>
@@ -225,7 +220,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
-                <version>2.5</version>
+                <version>${commons.javadoc.version}</version>
                 <configuration>
                     <aggregate>true</aggregate>
                 </configuration>