Support multi-users in MIQA with permissions

[aashish24]

Currently we have one user, we need to support multi-user mode where each user will have their own session and may import their own CSV

• A user has multiple sessions to review
• A session may have only one user with write access and others may have read access (have a lock on the session)
• There is no need for concurrent editing
• Each user has equal rights to write access on any imported session as long as they have write permission
• For now, any user can unlock the session but will be prompted
• We should be able to see who owns the lock

[aashish24]

Relates to #72 #73 # #173

[aashish24]

The workflow and the features will be:

• Technician users are linked to a particular site
• Define various kinds of users (roles) of the system: admin (site exemption), reviewer (review data from multiple site), technician (site specific only user, can see data from their site)

[aashish24]

Related to #204 (newer one)