Fixed java version

spring-cloud-contract-tools/spring-cloud-contract-gradle-plugin/build.gradle

@@ -25,6 +25,7 @@ ext {
 	]
 	JavaVersion javaVer = JavaVersion.current()
 	println "Current Java version equal to [${javaVer}]"
+	javaVersionNumber = javaVer.toString()
 	incompatibleJdk = javaVer.ordinal() > 8
 }
 

spring-cloud-contract-tools/spring-cloud-contract-maven-plugin/src/test/projects/spring-boot-groovy/pom.xml

@@ -32,6 +32,11 @@
     </parent>
 
     <dependencies>
+        <dependency>
+            <groupId>org.codehaus.groovy</groupId>
+            <artifactId>groovy</artifactId>
+            <version>2.4.15</version>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>