Upgrading OSB to latest release

Author: Albertoimpl

build.gradle

@@ -24,7 +24,7 @@ buildscript {
 		checkstyleVersion = "8.37"
 		commonsTextVersion = "1.8"
 		immutablesVersion = "2.8.8"
-		openServiceBrokerVersion = "3.4.0-M2"
+		openServiceBrokerVersion = "3.4.0"
 		pmdVersion = "6.29.0"
 		springBootVersion = "2.5.8"
 		springCredhubVersion = "2.2.0"