Check if try-catch-finally is supported in all JavaScript environemnts of supported Alfresco versions

[AFaust]

FEATURE / ENHANCEMENT

In some server-side JavaScript files we are using try-catch constructs with logic that always must run at the end included in both the try and catch block, because I (Axel) am still under the impression that support for try-catch-finally may not be consistent across all Alfresco versions. We should check explicitly what the status is with regards to try-catch-finally and refactory any instances of try-catch blocks into proper try-catch-finally, if applicable.