Upgrade kernel and device management core version

pom.xml

@@ -1181,7 +1181,7 @@
         <wso2.maven.compiler.target>1.7</wso2.maven.compiler.target>
 
         <!--Carbon kernel versions-->
-        <carbon.kernel.version>4.4.25</carbon.kernel.version>
+        <carbon.kernel.version>4.4.26</carbon.kernel.version>
         <carbon.kernel.version.range>[4.4.0, 4.5.0)</carbon.kernel.version.range>
 
         <carbon.p2.plugin.version>1.5.4</carbon.p2.plugin.version>
@@ -1215,7 +1215,7 @@
         <javax.ws.rs.version>1.1.1</javax.ws.rs.version>
 
         <!-- Carbon Device Management -->
-        <carbon.devicemgt.version>3.1.3</carbon.devicemgt.version>
+        <carbon.devicemgt.version>3.1.5</carbon.devicemgt.version>
         <carbon.devicemgt.version.range>[3.0.0, 4.0.0)</carbon.devicemgt.version.range>
 
         <!-- Carbon App Management -->