Install pam_pwquality on all machines
    
    e77f9f753d9c4387c782667df0014e81afb18cad added pam_pwquality.so to
    the stack - install the respective package in order for the library
    to be available.
    
    Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>