refactor variables and ensure that *-test.xml files are created even if no problems found
tweak call to action copy
instead of emailing default list re: unassigned jiras, send mail to component lead
refactoring and some debuggery to handle the case where there are multiple components for a single JIRA
add option to limit query to a smaller number (easier to test); support sending mail to all component owners when no assignees set; tweak email copy & refactor some variables
add caching for components and fix scoping bug + a few prints to see what is going on in build