[SPARK-27556][BUILD] Exclude com.zaxxer:HikariCP-java7 from hadoop-yarn-server-web-proxy

[wangyum]

What changes were proposed in this pull request?

There are two HikariCP packages in classpath when building with -Phive -Pyarn -Phadoop-3.2.

The HikariCP dependency tree:

[INFO] | +- org.apache.hadoop:hadoop-yarn-server-web-proxy:jar:3.2.0:compile
[INFO] | | \- org.apache.hadoop:hadoop-yarn-server-common:jar:3.2.0:compile
[INFO] | | +- org.apache.hadoop:hadoop-yarn-registry:jar:3.2.0:compile
[INFO] | | | \- commons-daemon:commons-daemon:jar:1.0.13:compile
[INFO] | | +- org.apache.geronimo.specs:geronimo-jcache_1.0_spec:jar:1.0-alpha-1:compile
[INFO] | | +- org.ehcache:ehcache:jar:3.3.1:compile
[INFO] | | +- com.zaxxer:HikariCP-java7:jar:2.4.12:compile

[INFO] +- org.apache.hive:hive-metastore:jar:2.3.4:compile
[INFO] | +- javolution:javolution:jar:5.5.1:compile
[INFO] | +- com.google.protobuf:protobuf-java:jar:2.5.0:compile
[INFO] | +- com.jolbox:bonecp:jar:0.8.0.RELEASE:compile
[INFO] | +- com.zaxxer:HikariCP:jar:2.5.1:compile

This pr exclude com.zaxxer:HikariCP-java7 from hadoop-yarn-server-web-proxy.

How was this patch tested?

manual tests

[srowen]

Do we just not need it so it's safe to exclude? Looks like it's a connection pool. If it's just used by YARN, OK I'm guessing this is fine.

[SparkQA]

Test build #104873 has finished for PR 24450 at commit e47641a.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[srowen]

Oh OK the point is that these aren't the same artifact; one is -java7 and so two copies end up in the build. Yeah I think this is the right move.

[srowen]

Merged to master