fix parenthesis in file and dir exists calls

lib/beaker/dsl/helpers/host_helpers.rb

@@ -470,12 +470,12 @@ def backup_the_file host, current_dir, new_dir, filename = 'puppet.conf'
         # @return [Boolean] Whether the file exists on the host (using `test -f`)
         def file_exists_on(host, file_path)
           if host['platform'] =~ /windows/
-            command = Command.new(%{IF exist "#{file_path}" exit 0 ELSE exit 1}, [], { :cmdexe => true, :accept_all_exit_codes => true })
+            command = Command.new(%{IF exist "#{file_path}" ( exit 0 ) ELSE ( exit 1 )}, [], { :cmdexe => true })
           else
-            command = Command.new(%(test -f "#{file_path}"), [], accept_all_exit_codes: true)
+            command = Command.new(%(test -f "#{file_path}"), [])
           end
 
-          return on(host, command).exit_code.zero?
+          return on(host, command, { :accept_all_exit_codes => true}).exit_code.zero?
         end
 
         # Check whether a directory exists on the host
@@ -488,12 +488,12 @@ def directory_exists_on(host, dir_path)
           if host['platform'] =~ /windows/
             dir_path = "#{dir_path}\\" unless (dir_path[-1].chr == '\\')
 
-            command = Command.new(%{IF exist "#{dir_path}" exit 0 ELSE exit 1}, [], { :cmdexe => true, :accept_all_exit_codes => true })
+            command = Command.new(%{IF exist "#{dir_path}" ( exit 0 ) ELSE ( exit 1 )}, [], { :cmdexe => true })
           else
-            command = Command.new(%(test -d "#{dir_path}"), [], accept_all_exit_codes: true)
+            command = Command.new(%(test -d "#{dir_path}"), [])
           end
 
-          return on(host, command).exit_code.zero?
+          return on(host, command, { :accept_all_exit_codes => true }).exit_code.zero?
         end
 
         # Check whether a symlink exists on the host