Added javax.activation, serialVersionUID for exceptions

spring-data-keyvalue-parent/pom.xml

@@ -260,6 +260,11 @@
         <artifactId>mail</artifactId>
         <version>1.4.1</version>
       </dependency>
+      <dependency>
+        <groupId>javax.activation</groupId>
+        <artifactId>activation</artifactId>
+        <version>1.1.1</version>
+      </dependency>
 
       <dependency>
         <groupId>org.mockito</groupId>

spring-data-riak/src/main/java/org/springframework/data/riak/DataStoreConnectionFailureException.java

@@ -23,6 +23,8 @@ import org.springframework.dao.DataAccessResourceFailureException;
  */
 public class DataStoreConnectionFailureException extends DataAccessResourceFailureException {
 
+  public static final long serialVersionUID = 1L;
+
   public DataStoreConnectionFailureException(String msg) {
     super(msg);
   }

spring-data-riak/src/main/java/org/springframework/data/riak/DataStoreOperationException.java

@@ -23,6 +23,8 @@ import org.springframework.dao.DataAccessException;
  */
 public class DataStoreOperationException extends DataAccessException {
 
+  public static final long serialVersionUID = 1L;
+
   public DataStoreOperationException(String msg) {
     super(msg);
   }