[REVIEW] FIX Use if statement to avoid silent error

[dillon-cullinan]

Test Output:

(base) dcullinan@dgx06:~/rapids/integration/ci/cpu$ if [[ -n $(ls test/* | grep -i rapids.*.tar.bz2) ]]; then ls test/* | grep -i rapids.*.tar.bz2; fi
test/rapids-blazing.tar.bz2
(base) dcullinan@dgx06:~/rapids/integration/ci/cpu$ if [[ -n $(ls test/* | grep -i FileThatDoesntExist.*.tar.bz2) ]]; then ls test/* | grep -i FileThatDoesntExist.*.tar.bz2; fi
(base) dcullinan@dgx06:~/rapids/integration/ci/cpu$ echo $?
0