Increased 'sleep' after starting ATS4 components

Added automatic start-up of the ATS4 Agent(s) and Engine components.

Replaced ats3_testdrop with ats_testdrop to handle sending test drops to ATS4 server

Catchup merge

Modified ats_specialise_test_drop to handle ats4 test plans

Correct handling of tag name and changeset author in sf-tag-hg-code Addition of sf-push-hg-tags and associated template file, for pushing the tags created in sf-tag-hg-code back out to the MCL. Minor whitespace rationalisation.

Added specification of changeset author when committing. Removed execution of hg out - that's taken care of in the push tags target/template.

Fix: package build fail because there is no package_definitions dir

Introduced new Helium property (sf.spec.ats.version) to specify ATS version

Changed locations of package_definitions to make the files a little bit more usable

Added call to produce package definition peices from system definition(s).

Enabled tool to create arbitrarily deep paths for output

Added a few strategically placed spaces, to improve the indentation of the output.

Merge in tools for manipulating sytem defintions from their own repo.

Move files into a directory appropriate for merging into main config repo.