t2000-wreck: fix ngpus tests

Somehow the ngpus tests in t2000-wreck.t were prefixed with a '+'
and more concerning, this just caused the tests to be skipped.
Remove the stray character and fix one of the tests.

t/t2000-wreck.t

@@ -210,18 +210,18 @@ test_expect_success 'wreckrun: -t2 -N${SIZE} sets correct ntasks in kvs' '
 	test "$n" = $((${SIZE}*2))
 '
 
-+test_expect_success 'wreckrun: ngpus is 0 by default' '
+test_expect_success 'wreckrun: ngpus is 0 by default' '
     flux wreckrun -n 2 /bin/true &&
     LWJ=$(last_job_path) &&
     n=$(flux kvs get --json ${LWJ}.ngpus) &&
     test "$n" = "0"
 '
 
-+test_expect_success 'wreckrun: -g, --ngpus sets ngpus in kvs' '
+test_expect_success 'wreckrun: -g, --ngpus sets ngpus in kvs' '
     flux wreckrun -n 2 -g 4 /bin/true &&
     LWJ=$(last_job_path) &&
     n=$(flux kvs get --json ${LWJ}.ngpus) &&
-    test "$n" = "4"
+    test "$n" = "8"
 '
 test_expect_success 'wreckrun: job with more nodes than tasks fails' '
 	test_must_fail flux wreckrun -n2 \