New Ravada version 2.1.5

[Francesc Guasch]

We just released Ravada v2.1.5 with bugfixes for v2.1

Follow this guide to upgrade : https://ravada.readthedocs.io/en/latest/docs/update.html

or install: https://ravada.readthedocs.io/en/latest/docs/INSTALL.html

• Properly check if request has finished
• Establish more accurate CSP headers [#1920]
• Correct unused files from duplicated storage pools
• Kali linux per year
• SSO user management
• Anonymous login
• Properly refresh CPU [#1969]
• Moved left requirements and user menu items [#1974]
• Import volume referenced by name [#1975]
• Allow volumes without extension [#1978]
• Properly check free storage size [#1980]