Code style
Command paramaters are built without whitespace
Examples use same port as app default
Uses a default error message if no message is produced by the script
Update messages.properties

This generic message will be replaced until then it is nice to have it as a complete sentence
Merge pull request #39 from aodn/Issue_#32

Uses a default error message if no message is produced by the script
Job emails have proper content
Merge pull request #38 from aodn/Issue_#35

Issue #35
Merge pull request #40 from aodn/email_content

Job emails have proper content
Merge branch 'master' into Issue_#34
Worker tests use Double values instead of Strings
Updated test to make incorrect behavior more obvious