okconfig install agent multiple issues

[palli]

There are multiple issues with the new output from okconfig install.

1. Command crashes if running as user because user lacks write permissions to /var/log/okconfig/install_agent.log

2. When error occurs, no troubleshooting output is printed to the user, instead only the "please check install_agent.log for errors is outputted. This can get very annoying.

3. In some cases errors can occur and the only output in the error log is "please check install_agent.log for more information"

4. When installing from adagios and there are any errors, the only output is "permission denied" on install_agent.log