[bugfix] Add OVAL check for telnet-server package for RHEL7

- Add OVAL check for existence of the telnet-server package
- Fixes #68
[bugfix][RHEL/6, RHEL/7] Add OVAL check for telnet-server package for RHEL7

- Add OVAL check for existence of the telnet package
- Add OVAL check for telnet service disabled
- Fixes #68
Update test attestation
Update telnet checks in rht-cpp profile

- Enable package_telnet_removed and service_telnetd_disabled in rht-cpp prof
Fix rht-cpp profile merge conflicts
Merge pull request #219 from redhatrises/telnet-server

[bugfix] Add checks for telnet packages and service for RHEL7