HBASE-15644 Use org.scala-tools:mave-scala-plugin for scaladocs.

Signed-off-by: Sean Busbey <busbey@apache.org>

pom.xml

@@ -75,6 +75,11 @@
   <!--Add apache snapshots in case we want to use unreleased versions of plugins:
       e.g. surefire 2.18-SNAPSHOT-->
   <pluginRepositories>
+    <pluginRepository>
+      <id>scala-tools.org</id>
+      <name>Scala-tools Maven2 Repository</name>
+      <url>http://scala-tools.org/repo-releases</url>
+    </pluginRepository>
     <pluginRepository>
       <id>apache.snapshots</id>
       <url>http://repository.apache.org/snapshots/</url>
@@ -1166,6 +1171,11 @@
         <inherited>true</inherited>
         <extensions>true</extensions>
       </plugin>
+      <plugin>
+        <groupId>org.scala-tools</groupId>
+        <artifactId>maven-scala-plugin</artifactId>
+        <version>2.15.2</version>
+      </plugin>
     </plugins>
   </build>
   <properties>
@@ -3067,6 +3077,10 @@
         </configuration>
       </plugin>
 
+      <plugin>
+        <groupId>org.scala-tools</groupId>
+        <artifactId>maven-scala-plugin</artifactId>
+      </plugin>
     </plugins>
   </reporting>
   <distributionManagement>