Migrate to main branch.

See #2345.

CI.adoc

@@ -1,6 +1,6 @@
 = Continuous Integration
 
-image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-commons%2Fmaster&subject=Moore%20(master)[link=https://jenkins.spring.io/view/SpringData/job/spring-data-commons/]
+image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-commons%2F&subject=Moore%20(main)[link=https://jenkins.spring.io/view/SpringData/job/spring-data-commons/]
 image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-commons%2F2.1.x&subject=Lovelace%20(2.1.x)[link=https://jenkins.spring.io/view/SpringData/job/spring-data-commons/]
 image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-commons%2F1.13.x&subject=Ingalls%20(1.13.x)[link=https://jenkins.spring.io/view/SpringData/job/spring-data-commons/]
 

CONTRIBUTING.adoc

@@ -1,3 +1,3 @@
 = Spring Data contribution guidelines
 
-You find the contribution guidelines for Spring Data projects https://github.com/spring-projects/spring-data-build/blob/master/CONTRIBUTING.adoc[here].
+You find the contribution guidelines for Spring Data projects https://github.com/spring-projects/spring-data-build/blob/CONTRIBUTING.adoc[here].

Jenkinsfile

@@ -3,7 +3,7 @@ pipeline {
 
 	triggers {
 		pollSCM 'H/10 * * * *'
-		upstream(upstreamProjects: "spring-data-build/master", threshold: hudson.model.Result.SUCCESS)
+		upstream(upstreamProjects: "spring-data-build/", threshold: hudson.model.Result.SUCCESS)
 	}
 
 	options {
@@ -15,7 +15,7 @@ pipeline {
 		stage("test: baseline (jdk8)") {
 			when {
 				anyOf {
-					branch 'master'
+					branch ''
 					not { triggeredBy 'UpstreamCause' }
 				}
 			}
@@ -37,7 +37,7 @@ pipeline {
 		stage("Test other configurations") {
 			when {
 				allOf {
-					branch 'master'
+					branch ''
 					not { triggeredBy 'UpstreamCause' }
 				}
 			}
@@ -79,7 +79,7 @@ pipeline {
 		stage('Release to artifactory') {
 			when {
 				anyOf {
-					branch 'master'
+					branch ''
 					not { triggeredBy 'UpstreamCause' }
 				}
 			}
@@ -111,7 +111,7 @@ pipeline {
 		}
 		stage('Publish documentation') {
 			when {
-				branch 'master'
+				branch ''
 			}
 			agent {
 				label 'data'

README.adoc

@@ -1,4 +1,4 @@
-= Spring Data Commons image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-commons%2Fmaster&subject=Build[link=https://jenkins.spring.io/view/SpringData/job/spring-data-commons/] https://gitter.im/spring-projects/spring-data[image:https://badges.gitter.im/spring-projects/spring-data.svg[Gitter]]
+= Spring Data Commons image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-commons%2F&subject=Build[link=https://jenkins.spring.io/view/SpringData/job/spring-data-commons/] https://gitter.im/spring-projects/spring-data[image:https://badges.gitter.im/spring-projects/spring-data.svg[Gitter]]
 
 https://projects.spring.io/spring-data/[Spring Data Commons] is part of the umbrella Spring Data project that provides shared infrastructure across the Spring Data projects. It contains technology neutral repository interfaces as well as a metadata model for persisting Java classes.