[nebulous-gui] TC_10 TC_11 Cannot add manually-managed nodes in NebulOuS

[Francisco Álvarez Terribas]

[summary]
Cannot add manually-managed nodes in NebulOuS:

- There is no way to set roles to users, the system have the admin with all permisions and other manualy created users which seem to have restricted permisions.
- The form to perform a device registration request is not available.
- There is no way to perform the "ask device-onboarding" step.

[environment]
Cluster installation: minikube start --memory=4g --driver=docker
Nebulous core manually installed following the wiki.

[steps to reproduce]
- Log into Nebulous GUI as admin
- Looked for device registration request in the following places:
  - {nebulous_base_url}/applications
  - {nebulous_base_url}/users
  - {nebulous_base_url}/applications/resources

[expected results]
- A device registration request is created.

If the device has enough resources:
- NebulOuS automatically collects the device capabilities.NebulOuS installs the NebulOuS agent in the device and the device registration process is completed successfully.
- Users Device owner and resource manager are informed about the status of the process.
- The device is made available to NebulOuS for deploying payloads.

If the device doesn't have enough resources:
- NebulOuS tries to collect the device capabilities but fails due to the device not meeting the requirements for installing the NebulOuS agent.
- Device owner and resource manager are informed about the status of the process. Relevant error logs are collected and made can be seen by these users.

[other relevant information]