Documentation: Refactor to match other plugin documentation

Move in-tree testing section before eclipse-related section for
consistency across other plugins and also to match standalone case.

Change-Id: I5f57308a8d9481c98d29a38d3131597dc1383b47

src/main/resources/Documentation/build.md

diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index e9e055e..eabf7d3 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -71,6 +71,12 @@
   bazel-bin/plugins/@PLUGIN@/@PLUGIN@.jar
 ```
 
+To execute the tests run:
+
+```
+  bazel test plugins/@PLUGIN@:@PLUGIN@_tests
+```
+
 This project can be imported into the Eclipse IDE.
 Add the plugin name to the `CUSTOM_PLUGINS` set in
 Gerrit core in `tools/bzl/plugins.bzl`, and execute:
@@ -79,12 +85,6 @@
   ./tools/eclipse/project.py
 ```
 
-To execute the tests run:
-
-```
-  bazel test plugins/@PLUGIN@:@PLUGIN@_tests
-```
-
 How to build the Gerrit Plugin API is described in the [Gerrit
 documentation](../../../Documentation/dev-bazel.html#_extension_and_plugin_api_jar_files).