Add support for running custom serviceability jvmti test

[fengxue-IS]

I'd like to request ability to run custom serviceability jvmti test.
Ideally with new test target:
serviceability_jvmti_custom
where a custom test path can be provided.

default test to run:
serviceability/jvmti/GetSystemProperty/JvmtiGetSystemPropertyTest.java

[fengxue-IS]

FYI @llxia

[llxia]

On second thought, instead of creating a separate test target for serviceability, maybe we can leverage the existing hotspot_custom

aqa-tests/openjdk/playlist.xml

Line 98 in feb08ca

<testCaseName>hotspot_custom</testCaseName>

Remove

aqa-tests/openjdk/playlist.xml

Lines 118 to 120 in feb08ca

	<impls>
	<impl>hotspot</impl>
	</impls>

and disable <impl>openj9</impl> via <disables>.

In this way, openj9 dev users can run any hotspot folder target via TARGET=disabled.hotspot_custom.

@LongyuZhang could you take care of this one? Thanks

[LongyuZhang]

Tested running with TARGET: disabled.hotspot_custom, and CUSTOM_TARGET: serviceability/jvmti/GetSystemProperty/JvmtiGetSystemPropertyTest.java.
The test runs but the CUSTOM_TARGET was not taken as hotspot_custom runs HOTSPOT_CUSTOM_TARGET (link) instead.
Found a related open issue #4408, which needs to be resolved first.

[llxia]

just for the record, usage for openj9

TARGET=disabled.hotspot_custom
CUSTOM_TARGET=serviceability/jvmti/GetSystemProperty/JvmtiGetSystemPropertyTest.java

[LongyuZhang]

Close this issue as fixed by #5370.

[sophia-guo]

Note per #5370, for openj9, hotspot_custom can only be used for serviceability jvmti test jdk19+ with the -nativepath set as hotspot native path -nativepath:"$(TESTIMAGE_PATH)/hotspot/jtreg/native, which meets currently requirements. It won't work if tests require openj9 nativepath. Better to add some comments or update some documents.

[sophia-guo]

I would prefer to add a custom serviceability jvmti test target instead of using hotspot_custom as a hack, which is confusing.

[sophia-guo]

#5491

[LongyuZhang]

Updated the usage for openj9 via #5493:

TARGET=hotspot_custom_j9
CUSTOM_TARGET=serviceability/jvmti/GetSystemProperty/JvmtiGetSystemPropertyTest.java

FYI @fengxue-IS