rt-tests: Rename PRIORITY -> RT_PRIORITY

[sebastianas]

The cyclictest command is run a low task priority. From the output in the test I see
| / # /lava-22804428/bin/lava-test-runner /lava-22804428/0 | + export TESTRUN_ID=0_rt-tests-cyclictest
| + TESTRUN_ID=0_rt-tests-cyclictest
| + cd /lava-22804428/0/tests/0_rt-tests-cyclictest | ++ cat uuid
| + UUID=22804428_1.1.4.1
| + set +x
| <LAVA_SIGNAL_STARTRUN 0_rt-tests-cyclictest 22804428_1.1.4.1> | + cd ./automated/linux/cyclictest/
| + ./cyclictest.sh -D 540s -p 48 -i 1000 -t 2 -a 0 -h '' -w hackbench | Received signal: 0_rt-tests-cyclictest 22804428_1.1.4.1 | Starting test lava.0_rt-tests-cyclictest (22804428_1.1.4.1) | Skipping test definition patterns.
| # /dev/cpu_dma_latency set to 0us
| T: 0 ( 437) P:48 I:1000 C: 540000 Min: 4 Act: 5 Avg: 18 Max: 217
| T: 1 ( 438) P:48 I:1500 C: 360000 Min: 4 Act: 9 Avg: 17 Max: 340
| t0-min-latency pass 4 us
| t0-avg-latency pass 18.29 us
| t0-max-latency pass 217 us
| t1-min-latency pass 4 us
| t1-avg-latency pass 17.69 us
| t1-max-latency pass 340 us
| cyclictest pass

and the test definition has
| name: rt-tests-cyclictest
| parameters:
…
| PRIORITY: 48
…
| status: finished
| priority: 48
| timeouts:

I think that PRIORITY and priority arguments are getting confused and instead of the cylictest priority it is using the scheduling priority.

Rename PRIORITY to RT_PRIORITY

Link: https://lava.collabora.dev/scheduler/job/22804428/definition

[sebastianas]

I have a counterpart change in kernelci/kernelci-core#3203. Is there Linaro repository that would need this, too?

[bhcopeland]

I have a counterpart change in kernelci/kernelci-core#3203. Is there Linaro repository that would need this, too?

No, it's fine to keep it in KCI; the test-definitions home is here. We will need to update test-def's when we do our next release here to take on the changes. But I can do that once this PR goes through + we do a release.