HBASE-26828 Increase the concurrency when running UTs in pre commit job

[Apache9]

Increase the maven build thread to 4, and also increase the surefire fork count from 0.25C to 0.5C.

This could save us a lot of time.

Please see #4211 for the result.

[Apache-HBase]

(!) A patch to the testing environment has been detected.
Re-executing against the patched versions to perform further tests.
The console is at https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4213/1/console in case of problems.

[Apache-HBase]

(!) A patch to the testing environment has been detected.
Re-executing against the patched versions to perform further tests.
The console is at https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4213/1/console in case of problems.

[Apache-HBase]

💔 -1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	0m 0s	Docker mode activated.
-1 ❌	docker	0m 0s	Docker command '/usr/bin/docker' is too old (1.41 < API v 1.27.0).

Subsystem	Report/Notes
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4213/1/console
versions	git=2.17.1
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This message was automatically generated.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 4s	Docker mode activated.
-0 ⚠️	yetus	0m 2s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck --skip-errorprone --exclude-tests-url --build-thread --surefire-first-part-fork-count --surefire-second-part-fork-count
		_ Prechecks _
		_ master Compile Tests _
+0 🆗	mvndep	0m 16s	Maven dependency ordering for branch
		_ Patch Compile Tests _
+0 🆗	mvndep	0m 3s	Maven dependency ordering for patch
		_ Other Tests _
		2m 5s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4213/1/artifact/yetus-jdk8-hadoop3-check/output/Dockerfile
GITHUB PR	#4213
Optional Tests
uname	Linux 15a133fba171 5.4.0-1025-aws #25~18.04.1-Ubuntu SMP Fri Sep 11 12:03:04 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / fd301ad
Max. process+thread count	28 (vs. ulimit of 30000)
modules	C: U:
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4213/1/console
versions	git=2.17.1 maven=3.6.3
Powered by	Apache Yetus 0.12.0 https://yetus.apache.org

This message was automatically generated.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 9s	Docker mode activated.
-0 ⚠️	yetus	0m 3s	Unprocessed flag(s): --quick-hadoopcheck --exclude-tests-url --asf-nightlies-general-check-base --build-thread --surefire-first-part-fork-count --surefire-second-part-fork-count
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+0 🆗	shelldocs	0m 0s	Shelldocs was not available.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
		_ master Compile Tests _
+0 🆗	mvndep	0m 50s	Maven dependency ordering for branch
		_ Patch Compile Tests _
+0 🆗	mvndep	0m 4s	Maven dependency ordering for patch
-0 ⚠️	shellcheck	0m 1s	The patch generated 4 new + 0 unchanged - 1 fixed = 4 total (was 1)
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
		_ Other Tests _
+0 🆗	asflicense	0m 0s	ASF License check generated no output?
		2m 47s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4213/1/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#4213
Optional Tests	dupname asflicense shellcheck shelldocs
uname	Linux 0e6047f79130 5.4.0-1025-aws #25~18.04.1-Ubuntu SMP Fri Sep 11 12:03:04 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / fd301ad
shellcheck	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4213/1/artifact/yetus-general-check/output/diff-patch-shellcheck.txt
Max. process+thread count	29 (vs. ulimit of 30000)
modules	C: U:
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4213/1/console
versions	git=2.17.1 maven=3.6.3 shellcheck=0.4.6
Powered by	Apache Yetus 0.12.0 https://yetus.apache.org

This message was automatically generated.

[nyl3532016]

+1