can't control edge with debuggerAddress

can't control edge opened with debuggerAddress

line 57 in splinter\driver\webdriver\edge.py is:
options = Options() or options

maybe it should be:
options = options or Options()

test code:will open a new edge ,that is not we expected
```
from selenium.webdriver.edge.options import Options
edge_options = Options()
edge_options.add_experimental_option("debuggerAddress", "127.0.0.1:9223")
browser = Browser('edge',options=edge_options)
```

Start in splinter/driver/webdriver/edge.py at line 57, then reproduce the issue with the provided Selenium Edge debuggerAddress example. Check the existing Edge driver tests for option handling and add coverage showing that an existing options object is used. Done means the browser attaches to the Edge instance at 127.0.0.1:9223 instead of opening a new one.

Written by the indexing model from the issue text.