Update AWS SDK version to add support for credential_process (gkatzioura#61)

Support added in 1.11.489 https://github.com/aws/aws-sdk-java/blob/master/CHANGELOG.md#111489-2019-01-24

Author: mark-edf

S3StorageWagon/pom.xml

@@ -12,7 +12,7 @@
     <description>S3 storage wagon</description>
 
     <properties>
-        <aws.version>1.11.487</aws.version>
+        <aws.version>1.11.595</aws.version>
         <httpcore>4.4.10</httpcore>
         <powermock.version>1.7.1</powermock.version>
     </properties>