do not log password and user info to y2log
version and changelog (bnc #883362)
document 'LogExecCmd' and use named param
complete name for params 'inc' and 'out'
remove unneeded dafault
tests added for LogExecCmd and SetAuth
test for correct call of LogExecCmd
add test-driver to .gitignore
Merge pull request #27 from gabi2/master

do not write user/password info to y2log (bnc #893362)