Support for encrypted passwords

[lslezak]

Problem

• The Agama autoinstallation and CLI accept the first user and the root passwords only in plain text
• That's insecure, everybody who can access the installation profile knows the root password

Solution

• Support passing an already encrypted (hashed) password in the profile
• Similar to AutoYaST, an additional encryptedPassword boolean flag is used to determine whether the specified password is encrypted (true value) or plain text (false value or missing in the profile)

Notes

• The web UI allows specifying only plain text passwords
• Encrypted passwords are long and hard to type and they need to be encrypted externally

Features

• Adapted schema definition
• Adapted the AutoYaST conversion tool
• When an encrypted password is set from Agama CLI then web UI resets the flag back to plain text (it supports only plain text passwords)

Testing

• Tested manually (both root user and first user), tested the AutoYaST profile conversion
• Updated unit tests

[coveralls]

Pull Request Test Coverage Report for Build 11860193169

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 11 of 15 (73.33%) changed or added relevant lines in 7 files are covered.
• 68 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.001%) to 71.348%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
rust/agama-lib/src/users/client.rs	0	1	0.0%
rust/agama-server/src/users/web.rs	0	1	0.0%
service/lib/agama/dbus/users.rb	3	4	75.0%
service/lib/agama/users.rb	3	4	75.0%

Files with Coverage Reduction	New Missed Lines	%
service/service/lib/agama/users.rb	1	96.77%
service/service/lib/agama/dbus/users.rb	16	61.11%
rust/agama-lib/src/users/client.rs	21	0.0%
rust/agama-server/src/users/web.rs	30	0.0%

Totals
Change from base Build 11842624800:	0.001%
Covered Lines:	16928
Relevant Lines:	23726

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💛 - Coveralls