Update aerospike java client and remove unsupported policies
diff --git a/gora-aerospike/src/main/java/org/apache/gora/aerospike/store/AerospikeMappingBuilder.java b/gora-aerospike/src/main/java/org/apache/gora/aerospike/store/AerospikeMappingBuilder.java
index 6d4f901..5973be8 100644
--- a/gora-aerospike/src/main/java/org/apache/gora/aerospike/store/AerospikeMappingBuilder.java
+++ b/gora-aerospike/src/main/java/org/apache/gora/aerospike/store/AerospikeMappingBuilder.java
@@ -96,12 +96,8 @@
               writePolicy.sendKey = getKeyUsagePolicy(
                       policyElement.getAttributeValue("key").toUpperCase(Locale.getDefault()));
             }
-            if (policyElement.getAttributeValue("retry") != null) {
-              writePolicy.retryOnTimeout = getRetryOnTimeoutPolicy(
-                      policyElement.getAttributeValue("retry").toUpperCase(Locale.getDefault()));
-            }
             if (policyElement.getAttributeValue("timeout") != null) {
-              writePolicy.timeout = getTimeoutValue(policyElement.getAttributeValue("timeout"));
+              writePolicy.timeoutDelay = getTimeoutValue(policyElement.getAttributeValue("timeout"));
             }
             aerospikeMapping.setWritePolicy(writePolicy);
           } else if (policy.equals("read")) {
@@ -111,7 +107,7 @@
                       policyElement.getAttributeValue("key").toUpperCase(Locale.getDefault()));
             }
             if (policyElement.getAttributeValue("timeout") != null) {
-              readPolicy.timeout = getTimeoutValue(policyElement.getAttributeValue("timeout"));
+              readPolicy.timeoutDelay = getTimeoutValue(policyElement.getAttributeValue("timeout"));
             }
             aerospikeMapping.setReadPolicy(readPolicy);
           }
@@ -265,34 +261,6 @@
   }
 
   /**
-   * Returns the corresponding retry on timeout policy from the user specified retry policy name
-   *
-   * @param retry retry policy name
-   * @return corresponding retry on timeout policy
-   */
-  private boolean getRetryOnTimeoutPolicy(String retry) {
-
-    if (retry == null) {
-      return false;
-    }
-
-    boolean retryOnTimeout;
-    switch (retry) {
-      case "NONE":
-        retryOnTimeout = false;
-        break;
-      case "ONCE":
-        retryOnTimeout = true;
-        break;
-      default: {
-        LOG.warn("Invalid key retry policy provided, using the default retry policy");
-        retryOnTimeout = false;
-      }
-    }
-    return retryOnTimeout;
-  }
-
-  /**
    * Returns the timeout value from the user specified timeout value
    *
    * @param timeout user specified timeout value
diff --git a/pom.xml b/pom.xml
index 09af363..652abee 100644
--- a/pom.xml
+++ b/pom.xml
@@ -762,7 +762,7 @@
     <restlet.version>2.3.1</restlet.version>
 
     <spark.version>1.4.1</spark.version>
-    <aerospike.version>3.3.2</aerospike.version>
+    <aerospike.version>4.0.6</aerospike.version>
     <!-- Misc Dependencies -->
     <guava.version>13.0</guava.version>
     <commons-lang.version>2.6</commons-lang.version>