ERROR was raised when no custmo config file matches in generate_sample.sh

[ChangBo Guo(gcb)]

In generate_sample.sh, the following code will fail when there is no file matches $BASEDIR/tools/config/*.conf.sample, CONCAT_FILE will be set with $BASEDIR/tools/config/*.conf.sample. An ERROR will be raised :
cat: ${BASEDIR}/tools/config/*.conf.sample: No such file or directory

for CONCAT_FILE in $BASEDIR/tools/config/*.conf.sample; do

    cat $CONCAT_FILE >> $OUTPUTFILE

done

Need get vlaue of 'ls $BASEDIR/tools/config/*.conf.sample' first to make sure we are passing right value to variable CONCAT_FILE.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/56409

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/56409
Committed: http://github.com/openstack/oslo-incubator/commit/ddc4f0d002b17c6eeb9c132d11ba1c110ab60391
Submitter: Jenkins
Branch: master

commit ddc4f0d002b17c6eeb9c132d11ba1c110ab60391
Author: Chang Bo Guo <email address hidden>
Date: Thu Nov 14 07:20:27 2013 -0800

    Fix error when no custom config file matches *.conf.sample

    In generate_sample.sh, an error will be raised when no custom config
    files match '$BASEDIR/tools/config/*.conf.sample', because CONCAT_FILE
    will be set with value '$BASEDIR/tools/config/*.conf.sample'.

    for CONCAT_FILE in $BASEDIR/tools/config/*.conf.sample; do

        cat $CONCAT_FILE >> $OUTPUTFILE

    done

    This path will check match result first to avoid the error.

    Closes-Bug: #1251297
    Change-Id: I4bb2036b1d385e8f7621cbd8b14134f12618230d