delete configuration server side - client doesn't create new configuration

[efef]

test condition:
-running client - VPN is started successfully
-delete server side the available client configuration (...vpn-user-portal/configurations)
-client after a while redirects to authentication page WRONG
-clients adds a second server profile WRONG

correct behaviour:
-client should automatically create a new valid configuration (as defined in api.md)

[ghost]

Before connecting you can check if the certificate is gonna work with the "check certificate" call: https://github.com/eduvpn/documentation/blob/master/API.md#check-certificate. The expected behaviour is also explained there.

[johankool]

Fixed with #90