Documentation: Refactor Eclipse related sections

Move standalone Eclipse IDE import section from in-tree to standalone
section. Move in-tree Eclipse IDE import after in-tree testing to match
other plugins.

Change-Id: Ieaba9f330f494c3cc1a6d524de0cb93c611b283f

src/main/resources/Documentation/build.md

diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index e59c128..5bd6251 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -25,6 +25,14 @@
   bazel test //...
 ```
 
+This project can be imported into the Eclipse IDE. Execute:
+
+```
+  ./tools/eclipse/project.sh
+```
+
+to generate the required files and then import the project.
+
 ### Build in Gerrit tree
 
 Put the external dependency Bazel build file into the Gerrit /plugins directory,
@@ -48,14 +56,6 @@
   bazel-bin/plugins/@PLUGIN@/@PLUGIN@.jar
 ```
 
-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:
-
-```
-  ./tools/eclipse/project.py
-```
-
 To execute the tests run either one of:
 
 ```
@@ -63,14 +63,14 @@
   bazel test plugins/@PLUGIN@:@PLUGIN@_tests
 ```
 
-This project can be imported into the Eclipse IDE. Execute:
+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:
 
 ```
-  ./tools/eclipse/project.sh
+  ./tools/eclipse/project.py
 ```
 
-to generate the required files and then import the project.
-
 How to build the Gerrit Plugin API is described in the [Gerrit
 documentation](../../../Documentation/dev-bazel.html#_extension_and_plugin_api_jar_files).