The script imports the /etc/sysconfig/scylla-server for configuration
settings (NR_PAGES). The /etc/sysconfig/scylla-server iincludes an AMI
param which is of string value and called as a last step in
scylla_install (after scylla_bootparam_setup has been initated).
The AMI variable is setup in scylla_install and is used in multiple
scripts. To resolve the conflict moving the import of
/etc/sysconfig/scylla-server after the AMI variable has been compared.
Fixes: #744
Signed-off-by: Shlomi Livne <shlomi@scylladb.com>