CVMFS_SYSLOG_LEVEL now supports a setting of `2`

[jcpunk]

Affected Puppet, Ruby, OS and module versions/distributions

• Puppet: 7
• Ruby: AIO
• Distribution: RHEL8
• Module version: 8.1.0

How to reproduce (e.g Puppet code you use)

Set cvmfs_syslog_level to 2

What are you seeing

Error 500 on SERVER: Server Error: Evaluation Error: Error while evaluating a Function Call, lambda: parameter 'cvmfs_syslog_level' expects a value of type Undef or Integer[0, 1], got Integer[2, 2]

What behaviour did you expect instead

Loglevel to match upstream support

Output log

Any additional information you'd like to impart

https://cvmfs.readthedocs.io/en/stable/apx-parameters.html