#31 EC2 WTP Clusters only support 32bit custom AMIs

[Jason Fulghum]

The EC2 New Cluster wizard fragment in the WTP New Server wizard only supports 32 bit EC2 instance types. The default Tomcat AMI is 32bit, so this is only an issue if a developer wants to use a 64bit custom AMI, instead of the provided 32bit Tomcat AMI.

In order to support using a custom 64bit AMI, the WTP wizard fragment for an EC2 cluster would need to be updated to:
- query the details of a custom AMI from Amazon EC2 after a developer enters the AMI ID
- update the instance type combo box to display only instance types with the same architecture as the specified AMI