Inherit AWS Java SDK Version

I think it would be best to have the Project Object Models for all subprojects of 37coins inherit from the parent. This way we only have to install one AWS Java SDK artifact, and can update it in one place. As it is, I have to install and add both to the path. 

I'm going to add another patch that adds this dependency to this model's parent. 

http://maven.apache.org/pom.html#Inheritance