Expose acceptance test framework as new plugin artifact

Split the current gerrit-acceptance-tests in two parts:

* framework + some needed deps, that is exposed as additional plugin
artifact
* rest of the gerrit-acceptance-test project

To implement the split and not to pull in too many dependencies, some
refactoring was needed. Particularly, gerrit-server:testutil depends
on gerrit-server:server, that depends on almost everything. Similar
problem was with gerrit-pgm:pgm, that is needed for AbstractDaemonTest
to work. Split the rules in gerrit-pgm to break transitive dependency
chain. We shouldn't ship artifacts twice, in plugin-api and in
acceptance-framework.

This change also partially reverts Ie9e63de622, where
//gerrit-acceptance-tests:lib with all its transitive dependencies was
included in plugin-api artifact.

Expose gerrit-acceptance-framework as new plugin artifact. This allows
us to support unit tests in plugins in three different build modes:

* Buck in tree build mode
* Buck standalone build mode
* Maven build

To install gerrit-acceptance-framework locally, the following command
is used:

  buck build api_install

To deploy gerrit-acceptance-framework to Maven Central, the following
command is used:

  buck build api_deploy

To support unit tests in tree build mode, the following Buck variable
is exposed: GERRIT_TESTS and can be used, e.g.:

  java_test(
    name = 'cookbook_tests',
    srcs = glob(['src/test/java/**/*IT.java']),
    labels = ['cookbook-plugin'],
    source_under_test = [':cookbook-plugin__plugin'],
    deps = GERRIT_PLUGIN_API + GERRIT_TESTS + [
      ':cookbook-plugin__plugin',
    ],
  )

To support unit tests in standalone build mode, acceptance-framework
maven jar is defined in lib/gerrit/BUCK file:

  maven_jar(
    name = 'acceptance-framework',
    id = 'com.google.gerrit:gerrit-acceptance-framework:' + VER,
    license = 'Apache2.0',
    attach_source = False,
    repository = REPO,
  )

bucklets/gerrit_plugin.bucklet is extended with the same variable
that points to the new maven_jar artifact, so that the same Buck
java_test() rule can be used in both modes.

Test plan:

1. run tests in gerrit tree
2. apply corresponding change to cookbook-plugin and run tests in
gerrit tree mode
3. apply corresponding change to bucklets, and run tests for
cookbook-plugin in standalone build mode

Change-Id: I4cadf6616de36ca24712f8b07d282b7a50911105

gerrit-gpg/BUCK

@@ -1,22 +1,23 @@
+DEPS = [
+  '//gerrit-common:server',
+  '//gerrit-extension-api:api',
+  '//gerrit-reviewdb:server',
+  '//gerrit-server:server',
+  '//lib:guava',
+  '//lib:gwtorm',
+  '//lib/guice:guice',
+  '//lib/guice:guice-assistedinject',
+  '//lib/guice:guice-servlet',
+  '//lib/jgit:jgit',
+  '//lib/log:api',
+]
+
 java_library(
   name = 'gpg',
   srcs = glob(['src/main/java/**/*.java']),
-  deps = [
-    '//gerrit-common:server',
-    '//gerrit-extension-api:api',
-    '//gerrit-reviewdb:server',
-    '//gerrit-server:server',
-    '//lib:guava',
-    '//lib:gwtorm',
-    '//lib/guice:guice',
-    '//lib/guice:guice-assistedinject',
-    '//lib/guice:guice-servlet',
-    '//lib/jgit:jgit',
-    '//lib/log:api',
-  ],
-  provided_deps = [
-    '//lib/bouncycastle:bcprov',
+  provided_deps = DEPS + [
     '//lib/bouncycastle:bcpg',
+    '//lib/bouncycastle:bcprov',
   ],
   visibility = ['PUBLIC'],
 )
@@ -28,12 +29,10 @@ TESTUTIL_SRCS = [
 java_library(
   name = 'testutil',
   srcs = TESTUTIL_SRCS,
-  deps = [
+  deps = DEPS + [
     ':gpg',
-    '//lib:guava',
     '//lib/bouncycastle:bcpg',
     '//lib/bouncycastle:bcprov',
-    '//lib/jgit:jgit',
   ],
   visibility = ['PUBLIC'],
 )
@@ -44,20 +43,15 @@ java_test(
     ['src/test/java/**/*.java'],
     excludes = TESTUTIL_SRCS,
   ),
-  deps = [
+  deps = DEPS + [
     ':gpg',
     ':testutil',
-    '//gerrit-extension-api:api',
-    '//gerrit-reviewdb:server',
-    '//gerrit-server:server',
+    '//gerrit-cache-h2:cache-h2',
+    '//gerrit-lucene:lucene',  
     '//gerrit-server:testutil',
-    '//lib:guava',
-    '//lib:gwtorm',
     '//lib:truth',
     '//lib/bouncycastle:bcpg',
     '//lib/bouncycastle:bcprov',
-    '//lib/guice:guice',
-    '//lib/jgit:jgit',
     '//lib/jgit:junit',
   ],
   source_under_test = [':gpg'],