Fixed typo

[AlbertoSH]

Whenever you try to discover the istio probes & actions, there's a typo that causes an error

$ # before fix
$ chaos discover chaostoolkit-istio
[2019-07-02 12:14:42 INFO] Attempting to download and install package 'chaostoolkit-istio'
[2019-07-02 12:14:43 INFO] Package downloaded and installed in current environment
[2019-07-02 12:14:44 INFO] Discovering capabilities from chaostoolkit-istio
[2019-07-02 12:14:44 INFO] Searching for actions
[2019-07-02 12:14:44 INFO] Searching for probes
[2019-07-02 12:14:44 CRITICAL] could not import extension module 'chaosisio.fault.probes'

$ # after fix
$ chaos discover chaostoolkit-istio
[2019-07-02 12:15:53 INFO] Attempting to download and install package 'chaostoolkit-istio'
[2019-07-02 12:15:54 INFO] Package downloaded and installed in current environment
[2019-07-02 12:15:54 INFO] Discovering capabilities from chaostoolkit-istio
[2019-07-02 12:15:54 INFO] Searching for actions
[2019-07-02 12:15:54 INFO] Searching for probes
[2019-07-02 12:15:55 INFO] Discovery outcome saved in ./discovery.json

Signed-off-by: AlbertoSH [email protected]

[Lawouach]

Gah! I forgot to include your PR :'(

Do you mind if I simply fix the typo myself?