Invalid SELinux model and provided information in case of disabled selinux

[pirat89]

The SELinux model does not reflect correctly what information we can get about SElinux with various setup. E.g. in case SElinux is disabled, we cannot get information about runtime mode (just None). Policy cannot contain whatever string. It can contain only these values:

• targeted - Targeted processes are protected,
• minimum - Modification of targeted policy. Only selected processes are protected.
• mls - Multi Level Security protection.

Regarding the /etc/selinux/config file. The model will be changed partially by the PR I will add here later just to fix broken tests. Proper fix will be still need.

• resolve issue
• write tests

[pirat89]

Possible solution would be detection of disabled selinux in the get_selinux_status function and in such case return a SELinux object with values reflecting the state.

[radomil]

This issue is addressed in #27

[radomil]

This issue has been fixed by above mentioned PR #27 merge and tests were covered by PR #56 merge.