Add PPR.3 changes
Add PPR.3 changes

Add the PPR.3 test to the PPR_testcase.py file, including a default config for the new test.

Changes to test_harness_objects.py will be made in the next commit.
Wireless-Innovation-Forum/Spectrum-Access-System,Wireless-Innovation-Forum/Spectrum-Access-System,Wireless-Innovation-Forum/Spectrum-Access-System,Wireless-Innovation-Forum/Spectrum-Access-System