add a uninstall_rpm function in common.sh
uninstall rpm after test completion
refactoring of package installation
FIX: also switch $HOME when opening a test-user shell
do not install server package on slc5
more environment setup
run all SLC5 related test cases
FIX: read permission issue in test 021 caused it to fail under SLC5
Merge pull request #129 from reneme/fix_stacktrace_test

FIX: read permission issue in test 021 caused it to fail under SLC5
Merge branch 'master' into cloud_testing