testsuite: add test for issue #1260

Problem: there is no test in the testsuite for the error reported by
issue #1260.

Add a resource-query test to the advanced resource tests.

t/data/resource/commands/advanced/cmds06.in

@@ -0,0 +1,2 @@
+match allocate @TEST_SRCDIR@/data/resource/jobspecs/issues/issue1260.yaml
+quit

t/data/resource/expected/advanced/006.R.out

@@ -0,0 +1,19 @@
+      ---------ssd0[1024:x]
+      ------------core0[1:x]
+      ------------core1[1:x]
+      ------------core2[1:x]
+      ------------core3[1:x]
+      ------------core4[1:x]
+      ------------core5[1:x]
+      ------------core6[1:x]
+      ------------core7[1:x]
+      ------------core8[1:x]
+      ------------core9[1:x]
+      ---------compute-01[1:x]
+      ------rack0[1:s]
+      ---compute0[1:s]
+INFO: =============================
+INFO: JOBID=1
+INFO: RESOURCES=ALLOCATED
+INFO: SCHEDULED AT=Now
+INFO: =============================