Update function definition name in log message to avoid confusion

Resolves #1102

Author: sryze

spring-cloud-function-context/src/main/java/org/springframework/cloud/function/context/config/RoutingFunction.java

@@ -205,9 +205,9 @@ private void assertOriginalInputIsNotPublisher(boolean originalInputIsPublisher)
 	private FunctionInvocationWrapper functionFromDefinition(String definition) {
 		FunctionInvocationWrapper function = this.resolveFunction(definition);
 		Assert.notNull(function, "Failed to lookup function to route based on the value of 'spring.cloud.function.definition' property '"
-				+ functionProperties.getDefinition() + "'");
+				+ definition + "'");
 		if (logger.isInfoEnabled()) {
-			logger.info("Resolved function from provided [definition] property " + functionProperties.getDefinition());
+			logger.info("Resolved function from provided [definition] property " + definition);
 		}
 		return function;
 	}