Maven Central Promotion Scripts

In an attempt to automate the promotion to Maven Central, this change adds
scripts for the intermediate steps of promotion to Bintray and then promotion
to Maven Central.

Author: nebhale

ci/promote-to-bintray.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env sh
+
+set -e
+
+NAME=$(jq -r .name cf-java-client/target/build-info.json)
+NUMBER=$(jq -r .number cf-java-client/target/build-info.json)
+
+## Promote to Bintray
+curl -X "POST" "https://repo.spring.io/api/build/distribute/$NAME/$NUMBER" \
+     -H "Content-Type: application/json; charset=utf-8" \
+     -u $ARTIFACTORY_USERNAME:$ARTIFACTORY_PASSWORD \
+     -d $"{ \"sourceRepos\": [ \"$SOURCE_REPOSITORY\" ], \"targetRepo\": \"$TARGET_REPOSITORY\" }"

ci/promote-to-bintray.yml

@@ -0,0 +1,20 @@
+---
+platform: linux
+
+image_resource:
+  type: docker-image
+  source:
+    repository: openjdk
+    tag: 8-jdk-alpine
+
+inputs:
+- name: cf-java-client
+
+run:
+  path: cf-java-client/ci/promote-to-bintray.sh
+
+params:
+  ARTIFACTORY_USERNAME:
+  ARTIFACTORY_PASSWORD:
+  SOURCE_REPOSITORY:    libs-release-local
+  TARGET_REPOSITORY:    spring-distributions

ci/promote-to-maven-central.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env sh
+
+set -e
+
+GROUP_ID=$(jq -r .modules[0].id cf-java-client/target/build-info.json | cut -d ':' -f 1)
+VERSION=$(jq -r .modules[0].id cf-java-client/target/build-info.json | cut -d ':' -f 3)
+
+## Promote to Maven Central
+curl -X "POST" "https://api.bintray.com/maven_central_sync/spring/jars/$GROUP_ID/versions/$VERSION" \
+     -H "Content-Type: application/json; charset=utf-8" \
+     -u $BINTRAY_USERNAME:$BINTRAY_API_KEY \
+     -d $"{ \"username\": \"$MAVEN_CENTRAL_USERNAME\", \"password\": \"$MAVEN_CENTRAL_PASSWORD\" }"

ci/promote-to-maven-central.yml

@@ -0,0 +1,20 @@
+---
+platform: linux
+
+image_resource:
+  type: docker-image
+  source:
+    repository: openjdk
+    tag: 8-jdk-alpine
+
+inputs:
+- name: cf-java-client
+
+run:
+  path: cf-java-client/ci/promote-to-maven-central.sh
+
+params:
+  BINTRAY_API_KEY:
+  BINTRAY_USERNAME:
+  MAVEN_CENTRAL_USERNAME:
+  MAVEN_CENTRAL_PASSWORD: