tests: qemumonitorjson: Consolidate basic node name detection test cases

Test cases named '1' and '2' differed only in the length of the backing
chain, so remove test case '2' and rename test '1' to 'basic'.
Reviewed-by: NEric Blake <eblake@redhat.com>

tests/qemumonitorjsondata/qemumonitorjson-nodename-2.result

-filename    : '/var/lib/libvirt/images/rhel7.3.1484071880'
-format node : '#block161'
-storage node: '#block013'
-backingfile : '/var/lib/libvirt/images/rhel7.3.1484071877'
-backing ptr : '#block316'
-  filename    : '/var/lib/libvirt/images/rhel7.3.1484071877'
-  format node : '#block316'
-  storage node: '#block248'
-  backingfile : '/var/lib/libvirt/images/rhel7.3.1484071876'
-  backing ptr : '#block560'
-    filename    : '/var/lib/libvirt/images/rhel7.3.1484071876'
-    format node : '#block560'
-    storage node: '#block430'
-    backingfile : '/var/lib/libvirt/images/rhel7.3.1484071872'
-    backing ptr : '#block717'
-      filename    : '/var/lib/libvirt/images/rhel7.3.1484071872'
-      format node : '#block717'
-      storage node: '#block612'
-      backingfile : '/var/lib/libvirt/images/rhel7.3.1483615252'
-      backing ptr : '#block998'
-        filename    : '/var/lib/libvirt/images/rhel7.3.1483615252'
-        format node : '#block998'
-        storage node: '#block843'
-        backingfile : '/var/lib/libvirt/images/rhel7.3.1483605924'
-        backing ptr : '#block1119'
-          filename    : '/var/lib/libvirt/images/rhel7.3.1483605924'
-          format node : '#block1119'
-          storage node: '#block1075'
-          backingfile : '/var/lib/libvirt/images/rhel7.3.1483605920'
-          backing ptr : '#block1350'
-            filename    : '/var/lib/libvirt/images/rhel7.3.1483605920'
-            format node : '#block1350'
-            storage node: '#block1204'
-            backingfile : '/var/lib/libvirt/images/rhel7.3.1483546244'
-            backing ptr : '#block1528'
-              filename    : '/var/lib/libvirt/images/rhel7.3.1483546244'
-              format node : '#block1528'
-              storage node: '#block1427'
-              backingfile : '/var/lib/libvirt/images/rhel7.3.1483545901'
-              backing ptr : '#block1799'
-                filename    : '/var/lib/libvirt/images/rhel7.3.1483545901'
-                format node : '#block1799'
-                storage node: '#block1690'
-                backingfile : '/var/lib/libvirt/images/rhel7.3.1483545313'
-                backing ptr : '#block1979'
-                  filename    : '/var/lib/libvirt/images/rhel7.3.1483545313'
-                  format node : '#block1979'
-                  storage node: '#block1814'
-                  backingfile : '/var/lib/libvirt/images/rhel7.3.1483536402'
-                  backing ptr : '#block2157'
-                    filename    : '/var/lib/libvirt/images/rhel7.3.1483536402'
-                    format node : '#block2157'
-                    storage node: '#block2008'
-                    backingfile : '/var/lib/libvirt/images/rhel7.3.qcow2'
-                    backing ptr : '#block2399'
-                      filename    : '/var/lib/libvirt/images/rhel7.3.qcow2'
-                      format node : '#block2399'
-                      storage node: '#block2281'
-                      backingfile : '<null>'
-                      backing ptr : '<null>'

tests/qemumonitorjsontest.c

@@ -2942,8 +2942,7 @@ mymain(void)
             ret = -1;                                                          \
     } while (0)
 
-    DO_TEST_BLOCK_NODE_DETECT("1", "#block118");
-    DO_TEST_BLOCK_NODE_DETECT("2", "#block161");
+    DO_TEST_BLOCK_NODE_DETECT("basic", "#block118");
     DO_TEST_BLOCK_NODE_DETECT("same-backing", "#block170,#block574");
     DO_TEST_BLOCK_NODE_DETECT("relative", "#block153,#block1177");
     DO_TEST_BLOCK_NODE_DETECT("gluster", "#block1008");