ipa-advise: fix script for smart card preparation
    
    The script has 2 issues:
    - if the http nickname contains spaces (like "CN=host,O=Example Org",
    which can happen when the http cert is provided by an external CA),
    the extraction of the nick from /etc/httpd/conf.d/nss.conf fails.
    The nick name is build using
    grep NSSNickname /etc/httpd/conf.d/nss.conf | cut -f 2 -d ' '
    which results in "CN=host,O=Example
    (note the end is missing).
    
    The script should rather use cut -f 2- -d ' ' in order to extract the
    whole nickname.
    - when the http nickname is enclosed in single quote, the script should
    remove them, otherwise the shell tries to escape them and fails to find
    the cert in /etc/httpd/alias.
    
    The fix is using sed "s/^'\(.*\)'$/\1/" in order to remove leading and
    trailing single quote, if present.
    
    Fixes: https://pagure.io/freeipa/issue/7706
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>