[feature] Added "auth_nocache" option to OpenVPN backend

[aagman945]

Added auth_nocache to OpenVPN

Closes #177

[coveralls]

Coverage remained the same at 99.94% when pulling e587287 on aagman945:issue#177 into 47b4435 on openwisp:master.

[pandafy]

@aagman945 this PR will need some more work before merging.

We will need to update the auto_client function of OpenVpn class to add auth_nocache field.

netjsonconfig/netjsonconfig/backends/openvpn/openvpn.py

Lines 23 to 34 in a90813c

	@classmethod
	def auto_client(
	cls,
	host,
	server,
	ca_path=None,
	ca_contents=None,
	cert_path=None,
	cert_contents=None,
	key_path=None,
	key_contents=None,
	):

Adding auth_nocache in the copy_keys list should do it.

We will also need to update tests after
making this change. In the tests, set the value of auth_nocache to True.

The documentation needs to be updated as well to reflect addition of this field.

[aagman945]

@pandafy should I update all the tests, or just test_server_mode & test_client_mode .

[pandafy]

Good work @aagman945, everything looks good to me. I have tested this with openwisp-controller as well.
The only problem I see is with the commit message. The commit message does not reference the issue. Read the commit style guideline here https://openwisp.io/docs/developer/contributing.html#how-to-commit-your-changes-properly

Also, can you squash you commits and rebase you PR on the latest master?

[aagman945]

Good work @aagman945, everything looks good to me. I have tested this with openwisp-controller as well. The only problem I see is with the commit message. The commit message does not reference the issue. Read the commit style guideline here https://openwisp.io/docs/developer/contributing.html#how-to-commit-your-changes-properly

Also, can you squash you commits and rebase you PR on the latest master?
@pandafy Sorry ,My bad
Done with the required changes

[pandafy]

@aagman945 the build is failing!

[pandafy]

LGTM! 👍🏼

@aagman945 the first word of the commit description should be capitalised ("Closes" and not "closes"). This time, we will update the description while merging. But if you are eager to continue contributing to OpenWISP, I ask you to please take care of these small details from next time.

Thanks for contributing!

Deferring merge to @nemesisdesign 😄

[aagman945]

LGTM! 👍🏼

@aagman945 the first word of the commit description should be capitalised ("Closes" and not "closes"). This time, we will update the description while merging. But if you are eager to continue contributing to OpenWISP, I ask you to please take care of these small details from next time.

Thanks for contributing!

Deferring merge to @nemesisdesign smile

I'll take care from next time.