Check functional tests passed

[ki4070ma]

The problem

Some functional tests are failed because of no maintenance.
So we need to check if each functional test works and fix test code and production code if necessary.

Example: #366, #364

Others

• Would like to run functional tests on ci

[ki4070ma]

Need to be checked by both python2 and python3

Android

• appium_tests
• chrome_tests
• context_switching_tests
• find_by_accessibility_id_tests
• find_by_image_tests
• find_by_uiautomator_tests
• finger_print_tests
• ime_tests
• multi_action_tests
• network_connection_tests
• push_file_tests -> remote_fs_tests
• selendroid_tests
• touch_action_tests

iOS

• appium_tests
• find_by_element_webelement_tests
• find_by_ios_class_chain_tests
• find_by_ios_predicate_tests
• find_by_uiautomation_tests
• push_file_tests
• safari_tests

[KazuCocoa]

selendroid_tests is removeable since it is deprecated => http://appium.io/docs/en/drivers/android-selendroid/