Finalize 3.1.5 release notes

Change-Id: Ibd0d9a3dc08cdaff3791e30e2349a02b348bd30a
diff --git a/pages/site/releases/3.1.md b/pages/site/releases/3.1.md
index d8264ea..3511ef7 100644
--- a/pages/site/releases/3.1.md
+++ b/pages/site/releases/3.1.md
@@ -6,13 +6,15 @@
 toc: true
 ---
 
-Download: **[3.1.4](https://gerrit-releases.storage.googleapis.com/gerrit-3.1.4.war)**
+Download: **[3.1.5](https://gerrit-releases.storage.googleapis.com/gerrit-3.1.5.war)**
+| [3.1.4](https://gerrit-releases.storage.googleapis.com/gerrit-3.1.4.war)
 | [3.1.3](https://gerrit-releases.storage.googleapis.com/gerrit-3.1.3.war)
 | [3.1.2](https://gerrit-releases.storage.googleapis.com/gerrit-3.1.2.war)
 | [3.1.1](https://gerrit-releases.storage.googleapis.com/gerrit-3.1.1.war)
 | [3.1.0](https://gerrit-releases.storage.googleapis.com/gerrit-3.1.0.war)
 
-Documentation: **[3.1.4](https://gerrit-documentation.storage.googleapis.com/Documentation/3.1.4/index.html)**
+Documentation: **[3.1.5](https://gerrit-documentation.storage.googleapis.com/Documentation/3.1.5/index.html)**
+| [3.1.4](https://gerrit-documentation.storage.googleapis.com/Documentation/3.1.4/index.html)
 | [3.1.3](https://gerrit-documentation.storage.googleapis.com/Documentation/3.1.3/index.html)
 | [3.1.2](https://gerrit-documentation.storage.googleapis.com/Documentation/3.1.2/index.html)
 | [3.1.1](https://gerrit-documentation.storage.googleapis.com/Documentation/3.1.1/index.html)
@@ -292,14 +294,14 @@
 
 ## Bugfix Releases
 
-### 3.1.5 (in development)
+### 3.1.5
 
 * New Features
 
   * Enable to run online noteDb migration using multiple threads.
 
     The new configuration option
-    [`notedb.onlineMigrationThreads`](http://gerrit-documentation.storage.googleapis.com/Documentation/3.0.9/config-gerrit.html#notedb.onlineMigrationThreads)
+    [`notedb.onlineMigrationThreads`](http://gerrit-documentation.storage.googleapis.com/Documentation/3.1.5/config-gerrit.html#notedb.onlineMigrationThreads)
     allows tuning the number of threads the migration can use.
 
     This helps to speed up online migration at the expense of imposing a
@@ -321,7 +323,7 @@
     several minutes on larger installations.
 
     Installations that still want to use this metric must explicitly enable it with the
-    [cache.enableDiskStatMetrics](http://gerrit-documentation.storage.googleapis.com/Documentation/2.16.18/config-gerrit.html#cache.enableDiskStatMetrics)
+    [cache.enableDiskStatMetrics](http://gerrit-documentation.storage.googleapis.com/Documentation/3.1.5/config-gerrit.html#cache.enableDiskStatMetrics)
     configuration option.
 
   * Plugin API: Deprecated methods related to the draft workflow and change edits are removed
@@ -338,7 +340,7 @@
 
   * Allow end-to-end tests to proportionally scale on their expected execution times.
 
-    A `power_factor` [environment property](http://gerrit-documentation.storage.googleapis.com/Documentation/3.0.9/dev-e2e-tests.html#_environment_properties)
+    A `power_factor` [environment property](http://gerrit-documentation.storage.googleapis.com/Documentation/3.1.5/dev-e2e-tests.html#_environment_properties)
     was added to the end-to-end tests core framework. Using that optional property,
     scenario steps can take some more (or less) time prior to expecting proper completion.
 
@@ -357,7 +359,7 @@
   * Allow scenarios to create and delete Gerrit changes alongside projects.
 
     Add the corresponding core support for an optional `http` request body to every such
-    `GerritSimulation`. Either automate or allow [environment properties](http://gerrit-documentation.storage.googleapis.com/Documentation/3.0.9/dev-e2e-tests.html#_environment_properties)
+    `GerritSimulation`. Either automate or allow [environment properties](http://gerrit-documentation.storage.googleapis.com/Documentation/3.1.5/dev-e2e-tests.html#_environment_properties)
     to feed the related input test data.
 
     Beside core, make the `high-availability` and `multi-site` plugin scenarios test changes