Chain result upto compare method

Address review feedback

Author: vishrutshah

lib/commands/oad.js

@@ -27,7 +27,12 @@ exports.handler = function (argv) {
   vOptions.logFilepath = argv.f;
   vOptions.json = argv.j;
 
-  return validate.compare(oldSpec, newSpec, vOptions);
+  return validate.compare(oldSpec, newSpec, vOptions).then((result) => {
+    console.log(result);
+  }).catch(err => {
+    console.log(err);
+    process.exitCode = 1;
+  });
 }
 
 exports = module.exports;

lib/validators/openApiDiff.js

@@ -61,11 +61,8 @@ class OpenApiDiff {
 
     return Promise.all([promise1, promise2]).then(results => {
       return self.processViaOpenApiDiff(results[0], results[1]).then((result, error) => {
-        console.log(result);
-      })
-    }).catch(err => {
-      console.log(err);
-      process.exit(1);
+        return Promise.resolve(result);
+      });
     });
   }