change 'required' to 'isRequired' and remove the default (#227)

Author: ahmedmuhsin

pom.xml

@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.microsoft.azure.functions</groupId>
 	<artifactId>azure-functions-java-library</artifactId>
-	<version>3.2.0</version>
+	<version>3.2.1</version>
 	<packaging>jar</packaging>
 	<parent>
 		<groupId>com.microsoft.maven</groupId>

src/main/java/com/microsoft/azure/functions/annotation/McpToolProperty.java

@@ -68,5 +68,5 @@
      * 
      * @return true if required, false if optional
      */
-    boolean required() default false;
+    boolean isRequired();
 }