EC2 webserver examples failing

[joeduffy]

Trying to deploy e.g. aws-ts-webserver fails because we're using an out-of-date AMI filter:

    error: Running program '...' failed with an unhandled exception:
    <ref *1> Error: invocation of aws:ec2/getAmi:getAmi returned an error: invoking aws:ec2/getAmi:getAmi: 1 error occurred:
    	* Your query returned no results. Please change your search criteria and try again.

These are very basic and common examples. Also, do we validate these in tests somewhere?

[mjeffryes]

Fixed by #2165

[pulumi-bot]

Cannot close issue:

• does not have required labels: resolution/

Please fix these problems and try again.