Move jacoco config

Issue gh-95

core/spring-security-core2.gradle

@@ -8,7 +8,3 @@ dependencies {
 	testCompile 'org.assertj:assertj-core'
 	testCompile 'org.mockito:mockito-core'
 }
-
-jacoco {
-	toolVersion = '0.8.5'
-}

oauth2-authorization-server/spring-security-oauth2-authorization-server.gradle

@@ -15,3 +15,7 @@ dependencies {
 
 	provided 'javax.servlet:javax.servlet-api'
 }
+
+jacoco {
+	toolVersion = '0.8.5'
+}