Release 5.7.0-RC1

Author: rwinch

docs/antora.yml

@@ -1,3 +1,4 @@
 name: ROOT
-version: '5.7.0'
-prerelease: '-SNAPSHOT'
+version: '5.7.0-RC1'
+display_version: '5.7.0-RC1'
+prerelease: true

gradle.properties

@@ -3,7 +3,7 @@ springJavaformatVersion=0.0.31
 springBootVersion=2.4.2
 springFrameworkVersion=5.3.19
 openSamlVersion=3.4.6
-version=5.7.0-SNAPSHOT
+version=5.7.0-RC1
 kotlinVersion=1.6.20
 samplesBranch=5.7.x
 org.gradle.jvmargs=-Xmx3g -XX:MaxPermSize=2048m -XX:+HeapDumpOnOutOfMemoryError