Preparing for 3.1.0 release (#147)

* Upgrading spring-boot to 3.1.x

* Making main release 3.1.x

* Adding PR pipeline

* Adding integration-tests to the build step

* Update credhub-server/README.adoc

Co-authored-by: Gareth Clay <spikymonkey@users.noreply.github.com>

* Updating set-pipelines and channel name

* Removing unnecessary clean

* Adding docker mirror config and privileged tasks

---------

Co-authored-by: Gareth Clay <spikymonkey@users.noreply.github.com>

.github/dependabot.yml

@@ -6,6 +6,20 @@ updates:
     schedule:
       interval: daily
     open-pull-requests-limit: 15
+    labels:
+      - "dependency-upgrade"
+    commit-message:
+      prefix: "3.1.x"
+    ignore:
+      - dependency-name: "*"
+        update-types: ["version-update:semver-major", "version-update:semver-minor"]
+
+  - package-ecosystem: gradle
+    directory: "/"
+    target-branch: "3.0.x"
+    schedule:
+      interval: daily
+    open-pull-requests-limit: 15
     labels:
       - "dependency-upgrade"
     commit-message: