Password file versioning, support for old versions

Password file versioning, support for old versions

[Issue#]        SSDWSSP-711
[Bug/Feature]   Security server crashes after update to version with a
                new password file format.
[Cause]         There was no backward compatibility support.
[Solution]      Introduce a new password file format with versioning and
                algorithm identifier associated with every password
                entry. Additionally security server can read all old
                password file formats, but can only save in the newest.
                Also incorrect file mask was fixed.
[Verification]  Build, install, run tests. Check migration from old
                password file formats to the new one (folder:
                /opt/data/security-server, old file name: password.pwd,
                new file name: password).

Change-Id: If25952ddc467172fc8032fb98a31e9413762882e