Fix issue with the error messages

Many of the errors where incorrectly showing "Required field is not
provided" when the field was provided but not valid.
This was raised by @ron on PR #3825

test/core/utils.js

@@ -524,7 +524,7 @@ describe("utils", function() {
         type: "boolean",
         value: "test string"
       }
-      assertValidateParam(param, ["Required field is not provided"])
+      assertValidateParam(param, ["Value must be a boolean"])
 
       // valid boolean value
       param = {
@@ -584,7 +584,7 @@ describe("utils", function() {
         type: "number",
         value: "test"
       }
-      assertValidateParam(param, ["Required field is not provided"])
+      assertValidateParam(param, ["Value must be a number"])
 
       // invalid number, undefined value
       param = {
@@ -666,7 +666,7 @@ describe("utils", function() {
         type: "integer",
         value: "test"
       }
-      assertValidateParam(param, ["Required field is not provided"])
+      assertValidateParam(param, ["Value must be an integer"])
 
       // invalid integer, undefined value
       param = {