Correct shell script linting

The use of shellcheck was recently merged which has noted a few issues
with the `bootstrap.sh` script used to clean and configure the fan
applications. This did not cause an error in the `format-code.sh` check
since there's no `.shellcheck` file, however it still showed the issues
during unit test runs.

Change-Id: I3973112f4839afc6ea81863c2c54100e680bb260
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
1 file changed