improved error and info logs when loading configurations

[engelmi]

This PR addresses #299

[mwperina]

Hi Douglas,
configuration files handling has been implemented according to following issues:

#147
#148
#172

The PR #253 changed this a bit, but still following rules applies:

1. If /etc/hirte/{hirte|agent}/conf doesn't exist, we should not produce any error
2. If /etc/hirte/{hirte|agent}/conf exist, but it contains an error inside the file, we should fail the startup (clearly user error)
3. If /etc/hirte/{hirte|agent}.conf.d doesn't exist or it's empty (we care only about files with .conf suffix), we should not produce any error
4. If /etc/hirte/{hirte|agent}.conf.d exists and it contains a file with .conf suffix, which contains an error inside it, we should fail the startup (clearly user error)

The only planned changes around configuration are described at #301

[mwperina]

Except the error message content change it looks good to me

[dougsland]

Hi Douglas, configuration files handling has been implemented according to following issues:

#147 #148 #172

The PR #253 changed this a bit, but still following rules applies:

1. If /etc/hirte/{hirte|agent}/conf doesn't exist, we should not produce any error
2. If /etc/hirte/{hirte|agent}/conf exist, but it contains an error inside the file, we should fail the startup (clearly user error)
3. If /etc/hirte/{hirte|agent}.conf.d doesn't exist or it's empty (we care only about files with .conf suffix), we should not produce any error
4. If /etc/hirte/{hirte|agent}.conf.d exists and it contains a file with .conf suffix, which contains an error inside it, we should fail the startup (clearly user error)

The only planned changes around configuration are described at #301

Hello @mwperina Thanks for sharing the info. I am not saying the RFEs created to manage the config files are incorrect. I am just seeing some improvements are possible here. However, let's move forward with @engelmi work. I will work this week to prepare a proof of concept and send a PR.

Thanks guys!

[dougsland]

/retest
/lgtm

[mwperina]

+1