Testing sugar modifications

Launching instances using @environments and/or @applications sugar now adds separate test. So, logging looks like:
```
test00_launch_EnvsServiceAppTestCase-App_on_environment_AmazonEC2_Ubuntu_1004_for_EnvsServiceAppTestCase (integration_tests.testing.test_application_deco.EnvsServiceAppTestCase) ... ok
test00_launch_EnvsServiceAppTestCase-App_on_environment_default (integration_tests.testing.test_application_deco.EnvsServiceAppTestCase) ... ERROR
test_out_on_environment_AmazonEC2_Ubuntu_1004_for_EnvsServiceAppTestCase (integration_tests.testing.test_application_deco.EnvsServiceAppTestCase) ... ok
test_out_on_environment_default (integration_tests.testing.test_application_deco.EnvsServiceAppTestCase) ... ERROR```

Added @applications decorator. (usage same as self.app)