Make test more robust

Disable srun --bcast option test if SlurmdUser != root as the
  operation/test  will not work otherwise.

testsuite/expect/test1.101

 #!/usr/bin/env expect
 ############################################################################
 # Purpose: Test of SLURM functionality
-#          est of --bcast option.
+#          Test of --bcast option.
 #
 # Output:  "TEST: #.#" followed by "SUCCESS" if test was successful, OR
 #          "WARNING: ..." with an explanation of why the test can't be made, OR
@@ -53,6 +53,11 @@ if {[test_alps]} {
 	exit 0
 }
 
+if {[slurmd_user_root] == 0} {
+	send_user "\nWARNING: This test is incompatible with SlurmdUser != root\n"
+	exit 0
+}
+
 make_bash_script $file_in "echo \$0"
 set salloc_pid [spawn $salloc -N1-5 -t1 bash]
 expect {