Merge pull request #60 from stdweird/el7

Support EL7.
[maven-release-plugin] prepare release aii-14.6.0-rc1
[maven-release-plugin] prepare for next development iteration
ks logging host is optional and fix bug to disable console logging
add unittest for logging config without host and console logging
disabled
ks logging host is optional now, if it is missing, it means no anaconda
syslog config
unittests for unset logging host (ie no anaconda syslog)