Update aws-sdk-java to 1.10.12

Follow up for elastic#234. Release notes: http://aws.amazon.com/releasenotes/Java/6635368276326731 Closes elastic#236. (cherry picked from commit 51d70f2) (cherry picked from commit bc56248)

Author: dadoonet

pom.xml

@@ -32,7 +32,7 @@
  </parent>
 
  <properties>
- <amazonaws.version>1.10.11</amazonaws.version>
+ <amazonaws.version>1.10.12</amazonaws.version>
  </properties>
 
  <dependencies>