MDL-42928 Filepicker: Disable behat tests run by phantom

There seems to be a bug relating to overflow: hidden on the body tag in
some cases which is only showing for dialogues which belong to the
filepicker.

Disabling these for the moment as this issue may be related to MDL-43712
which is a work in progress.

repository/tests/behat/cancel_add_file.feature

@@ -4,7 +4,7 @@ Feature: A selected file can be cancelled
   As a user
   I need to cancel a selected file
 
-  @javascript
+  @javascript @_bug_phantomjs
   Scenario: Cancel a selected recent file from being added to a folder
     Given the following "courses" exists:
       | fullname | shortname | category |

repository/tests/behat/create_folders.feature

@@ -4,7 +4,7 @@ Feature: Create folders in the file manager
   As a user
   I need to create folders and subfolders in a file area
 
-  @javascript
+  @javascript @_bug_phantomjs
   Scenario: Create folders and subfolders
     Given the following "courses" exists:
       | fullname | shortname | category |

repository/tests/behat/create_shortcut.feature

@@ -4,7 +4,7 @@ Feature: Create shortcuts
   As a teacher
   I need to be able to pick file as a shortcut
 
-  @javascript
+  @javascript @_bug_phantomjs
   Scenario: Upload a file as a copy and as a shortcut in filemanager
     Given the following "users" exists:
       | username | firstname | lastname | email |

repository/tests/behat/delete_files.feature

@@ -4,7 +4,7 @@ Feature: Delete files and folders from the file manager
   As a user
   I need to delete files from file areas
 
-  @javascript
+  @javascript @_bug_phantomjs
   Scenario: Delete a file and a folder
     Given I log in as "admin"
     And I expand "My profile" node

repository/tests/behat/overwrite_file.feature

@@ -4,7 +4,7 @@ Feature: Overwrite file feature
   As a user
   I need to pick the file with the same name and select to overwrite
 
-  @javascript
+  @javascript @_bug_phantomjs
   Scenario: Upload a file in filemanager and overwrite it
     Given the following "users" exists:
       | username | firstname | lastname | email |

repository/tests/behat/zip_and_unzip.feature

@@ -4,7 +4,7 @@ Feature: Zip folders and unzip compressed files
   As a user
   I need to zip and unzip folders and files
 
-  @javascript
+  @javascript @_bug_phantomjs
   Scenario: Zip and unzip folders and files
     Given the following "courses" exists:
       | fullname | shortname | category |