Move one emulator and IOC test to a support directory

[DominicOram]

As a support person I would like to be able to specify in the IOC test framework where my emulator and test are. Currently they're in a central location but as of #6131 we want to move them around. I would then like to put the emulator and tests into the support directory and be able to run "make ioctests" from this directory to run the test.

Acceptance Criteria

• The emulator and test paths can be specified when running the IOC test framework
• A simple IOC has the tests and emulator moved into it's support directory (preserving history)
• Running "make ioctests" in this directory runs the IOC Test
• Running "make ioctests" in EPICS_TOP recursively runs all tests (including this one), this is done as part of the IOC system tests jenkins build and the results are correctly uploaded to jenkins
• It is documented on Move emulator and IOC tests into support module #6556 how to do this exactly for other IOCs (remember to preserve history)
• The wiki is changed to match this new structure
• The ioc generator script is corrected to match this Pulled into IOC generator: issues #4659