Added php-cs-fixer coding standards validation to Travis CI (#14100)

* php-cs-fixer: PSR2 rule.

* php-cs-fixer: PSR2 rule - fix views.

* Travis setup refactoring.

* Add php-cs-fixer to travis cs tests.

* Fix tests on hhvm-3.12

* improve travis config

* composer update

* revert composer update

* improve travis config

* Fix CS.

* Extract config to separate classes.

* Extract config to separate classes.

* Add file header.

* Force short array syntax.

* binary_operator_spaces fixer

* Fix broken tests

* cast_spaces fixer

* concat_space fixer

* dir_constant fixer

* ereg_to_preg fixer

* function_typehint_space fixer

* hash_to_slash_comment fixer

* is_null fixer

* linebreak_after_opening_tag fixer

* lowercase_cast fixer

* magic_constant_casing fixer

* modernize_types_casting fixer

* native_function_casing fixer

* new_with_braces fixer

* no_alias_functions fixer

* no_blank_lines_after_class_opening fixer

* no_blank_lines_after_phpdoc fixer

* no_empty_comment fixer

* no_empty_phpdoc fixer

* no_empty_statement fixer

* no_extra_consecutive_blank_lines fixer

* no_leading_import_slash fixer

* no_leading_namespace_whitespace fixer

* no_mixed_echo_print fixer

* no_multiline_whitespace_around_double_arrow fixer

* no_multiline_whitespace_before_semicolons fixer

* no_php4_constructor fixer

* no_short_bool_cast fixer

* no_singleline_whitespace_before_semicolons fixer

* no_spaces_around_offset fixer

* no_trailing_comma_in_list_call fixer

* no_trailing_comma_in_singleline_array fixer

* no_unneeded_control_parentheses fixer

* no_unused_imports fixer

* no_useless_return fixer

* no_whitespace_before_comma_in_array fixer

* no_whitespace_in_blank_line fixer

* not_operator_with_successor_space fixer

* object_operator_without_whitespace fixer

* ordered_imports fixer

* php_unit_construct fixer

* php_unit_dedicate_assert fixer

* php_unit_fqcn_annotation fixer

* phpdoc_indent fixer

* phpdoc_no_access fixer

* phpdoc_no_empty_return fixer

* phpdoc_no_package fixer

* phpdoc_no_useless_inheritdoc fixer

* Fix broken tests

* phpdoc_return_self_reference fixer

* phpdoc_single_line_var_spacing fixer

* phpdoc_single_line_var_spacing fixer

* phpdoc_to_comment fixer

* phpdoc_trim fixer

* phpdoc_var_without_name fixer

* psr4 fixer

* self_accessor fixer

* short_scalar_cast fixer

* single_blank_line_before_namespace fixer

* single_quote fixer

* standardize_not_equals fixer

* ternary_operator_spaces fixer

* trailing_comma_in_multiline_array fixer

* trim_array_spaces fixer

* protected_to_private fixer

* unary_operator_spaces fixer

* whitespace_after_comma_in_array fixer

* `parent::setRules()` -> `$this->setRules()`

* blank_line_after_opening_tag fixer

* Update finder config.

* Revert changes for YiiRequirementChecker.

* Fix array formatting.

* Add missing import.

* Fix CS for new code merged from master.

* Fix some indentation issues.

framework/base/Module.php

@@ -415,7 +415,7 @@ class Module extends ServiceLocator
         }
 
         if (isset($this->_modules[$id])) {
-            if ($this->_modules[$id] instanceof Module) {
+            if ($this->_modules[$id] instanceof self) {
                 return $this->_modules[$id];
             } elseif ($load) {
                 Yii::trace("Loading module: $id", __METHOD__);
@@ -461,7 +461,7 @@ class Module extends ServiceLocator
         if ($loadedOnly) {
             $modules = [];
             foreach ($this->_modules as $module) {
-                if ($module instanceof Module) {
+                if ($module instanceof self) {
                     $modules[] = $module;
                 }
             }
@@ -567,7 +567,7 @@ class Module extends ServiceLocator
         }
 
         if (strpos($route, '/') !== false) {
-            list ($id, $route) = explode('/', $route, 2);
+            list($id, $route) = explode('/', $route, 2);
         } else {
             $id = $route;
             $route = '';
@@ -629,7 +629,7 @@ class Module extends ServiceLocator
         }
 
         $className = str_replace(' ', '', ucwords(str_replace('-', ' ', $className))) . 'Controller';
-        $className = ltrim($this->controllerNamespace . '\\' . str_replace('/', '\\', $prefix)  . $className, '\\');
+        $className = ltrim($this->controllerNamespace . '\\' . str_replace('/', '\\', $prefix) . $className, '\\');
         if (strpos($className, '-') !== false || !class_exists($className)) {
             return null;
         }
@@ -638,7 +638,7 @@ class Module extends ServiceLocator
             $controller = Yii::createObject($className, [$id, $this]);
             return get_class($controller) === $className ? $controller : null;
         } elseif (YII_DEBUG) {
-            throw new InvalidConfigException("Controller class must extend from \\yii\\base\\Controller.");
+            throw new InvalidConfigException('Controller class must extend from \\yii\\base\\Controller.');
         }
         return null;
     }