Pass --format argument to pyocd plugins

The --format argument added in cd27fcc
wasn't being passed to the pyocd plugin objects. So, when we tried to
look it up in the "kwargs" dictionary it would fail.

Author: rwalton-arm

src/mbed_os_tools/test/host_tests_runner/mbed_base.py

@@ -221,7 +221,9 @@ def copy_image_raw(self, image_path=None, disk=None, copy_method=None, port=None
                                         serial=port,
                                         destination_disk=disk,
                                         target_id=self.target_id,
-                                        pooling_timeout=self.polling_timeout)
+                                        pooling_timeout=self.polling_timeout,
+                                        format=self.options.format
+                                        )
         return result
 
     def hw_reset(self):
@@ -234,7 +236,8 @@ def hw_reset(self):
         result = ht_plugins.call_plugin('ResetMethod',
                                         'power_cycle',
                                         target_id=self.target_id,
-                                        device_info=device_info)
+                                        device_info=device_info,
+                                        format=self.options.format)
         if result:
             self.port = device_info['serial_port']
             self.disk = device_info['mount_point']