IMPALA-14559: Ship calcite-planner jar in Impala packages

This adds the java/impala-package Maven project to make it easier
to ship / test the Calcite planner. impala-package has a dependency
on impala-frontend and calcite-planner, so its classpath requires
no extra work when constructing the classpath.

An additional cleanup is that this no longer puts the
impala-frontend-*-tests.jar on the classpath by default. This requires
updating the query event hooks test, as it relies on that jar being
present.

This does not change the default value for the use_calcite_planner
query option, so there is no change in behavior.

Testing:
 - Ran a core job
 - Built docker images and OS packages locally

Change-Id: I81dec2a5b59e279229a735c8bb1a23c77111a793
Reviewed-on: http://gerrit.cloudera.org:8080/23497
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>

tests/custom_cluster/test_query_event_hooks.py

@@ -18,17 +18,31 @@
 # Client tests for Query Event Hooks
 
 from __future__ import absolute_import, division, print_function
+import os
 import pytest
 
 from tests.common.custom_cluster_test_suite import CustomClusterTestSuite
 
 
+def add_frontend_test_jar_to_classpath():
+  """Put the impala-frontend-*-tests.jar on the classpath"""
+  os.environ["CUSTOM_CLASSPATH"] = os.path.join(os.getenv("IMPALA_HOME"), "fe",
+        "target", "impala-frontend-{0}-tests.jar".format(os.getenv("IMPALA_VERSION")))
+
+
 class TestHooks(CustomClusterTestSuite):
   """
   Tests for FE QueryEventHook invocations.
   """
   DUMMY_HOOK = "org.apache.impala.testutil.DummyQueryEventHook"
 
+  @classmethod
+  def setup_class(cls):
+    super(TestHooks, cls).setup_class()
+    # This needs the impala-frontend-*-tests.jar on the classpath to make the test query
+    # hooks available.
+    add_frontend_test_jar_to_classpath()
+
   @pytest.mark.execute_serially
   @CustomClusterTestSuite.with_args(
       impala_log_dir="{query_event_hooks_log}",
@@ -65,6 +79,9 @@ class TestHooksStartupFail(CustomClusterTestSuite):
     if cls.exploration_strategy() != 'exhaustive':
       pytest.skip('runs only in exhaustive')
     super(TestHooksStartupFail, cls).setup_class()
+    # This needs the impala-frontend-*-tests.jar on the classpath to make the test query
+    # hooks available.
+    add_frontend_test_jar_to_classpath()
 
   FAILING_HOOK = "org.apache.impala.testutil.AlwaysErrorQueryEventHook"
   NONEXIST_HOOK = "captain.hook"