Fixed missing selinux context setup for live ISOs

When building live ISO images the selinux context was not created
for eventually new created files during the live ISO creation
process. This Fixes OSInside/kiwi-boxed-plugin#99

kiwi/builder/live.py

@@ -189,6 +189,8 @@ class LiveImageBuilder:
             working_directory=self.root_dir
         )
 
+        self.system_setup.setup_selinux_file_contexts()
+
         # prepare dracut initrd call
         self.boot_image.prepare()
 
@@ -251,6 +253,9 @@ class LiveImageBuilder:
             'mount_options': self.xml_state.get_fs_mount_option_list(),
             'create_options': self.xml_state.get_fs_create_option_list()
         }
+
+        self.system_setup.setup_selinux_file_contexts()
+
         filesystem_setup = FileSystemSetup(
             self.xml_state, self.root_dir
         )

test/unit/builder/live_test.py

@@ -227,6 +227,10 @@ class TestLiveImageBuilder:
 
         self.setup.import_cdroot_files.assert_called_once_with('temp_media_dir')
 
+        assert self.setup.setup_selinux_file_contexts.call_args_list == [
+            call(), call()
+        ]
+
         assert kiwi.builder.live.FileSystem.new.call_args_list == [
             call(
                 device_provider=self.loop, name='ext4',