Revert gulp --no-color

Tasks/Gulp/gulptask.ts

@@ -30,7 +30,6 @@ if(!tl.exist(gulp)) {
 }
 else {
 	var gt = tl.createToolRunner(gulp);
-	gt.arg('--no-color');
 }
 
 // optional - no targets will concat nothing

Tests/L0/Gulp/_suite.ts

@@ -40,7 +40,7 @@ describe('Gulp Suite', function() {
 		tr.setInput('gulpjs', 'node_modules/gulp/gulp.js');
 		tr.run()
 		.then(() => {
-            assert(tr.ran('/usr/local/bin/gulp --no-color --gulpfile gulpfile.js'), 'it should have run Gulp');
+            assert(tr.ran('/usr/local/bin/gulp --gulpfile gulpfile.js'), 'it should have run Gulp');
             assert(tr.invokedToolCount == 1, 'should have only run Gulp');
 
 			assert(tr.stderr.length == 0, 'should not have written to stderr');
@@ -223,7 +223,7 @@ describe('Gulp Suite', function() {
 		tr.setInput('gulpjs', 'node_modules/gulp/gulp.js');
 		tr.run()
 		.then(() => {
-            assert(tr.ran('/usr/local/bin/gulp --no-color --gulpfile gulpfile.js'), 'it should have run gulp');
+            assert(tr.ran('/usr/local/bin/gulp --gulpfile gulpfile.js'), 'it should have run gulp');
             assert(tr.invokedToolCount == 1, 'should have only run gulp');
 
             // success scripts don't necessarily set a result

Tests/L0/Gulp/gulpFails.json

@@ -3,7 +3,7 @@
         "gulp": "/usr/local/bin/gulp"
     },
     "exec": {
-        "/usr/local/bin/gulp --no-color --gulpfile gulpfile.js": {
+        "/usr/local/bin/gulp --gulpfile gulpfile.js": {
             "code": 1,
             "stdout": "gulp output here",
             "stderr": "gulp failed with this output"

Tests/L0/Gulp/gulpGlobalGood.json

@@ -3,7 +3,7 @@
         "gulp": "/usr/local/bin/gulp"
     },
     "exec": {
-        "/usr/local/bin/gulp --no-color --gulpfile gulpfile.js": {
+        "/usr/local/bin/gulp --gulpfile gulpfile.js": {
             "code": 0,
             "stdout": "gulp output here"
         }