Description of problem:

Many of our augeas-based plugins throw an exception from their loadResourceConfiguration() methods when augeas is not available. 

We should consider changing this behavior to just returning null (and thus suggesting that configuration is "disabled") for the following reasons:

1) we don't spam the agent log with load config failure messages
2) the configuration is really technically just disabled because of the lack of support of augeas

Note that this is only of any importance on non-RHEL systems for which we don't bundle augeas native libraries.


How reproducible:
always

Steps to Reproduce:
1. install agent on AIX or some other UNIX-like system (that doesn't have augeas installed)
2. inventory it 
3. Try going to the Configuration tab of the Sudoers resource
  
Actual results:
exception

Expected results:
no exception because the configuration is merely disabled.

Additional info: