tests: only run startup XML tests if requested

Use the recently introduced flag as a witness.
This reduces the apparent number of test cases
to the real number of test cases.

Note that this does not suffer from the same problem
as commit 70255fa5 was fixing, because the condition
for running virTestRun does not depend on results
of previous tests.
Signed-off-by: NJán Tomko <jtomko@redhat.com>

tests/qemuxml2argvtest.c

@@ -475,6 +475,8 @@ testCheckExclusiveFlags(int flags)
                   FLAG_STEAL_VM |
                   0, -1);
 
+    VIR_EXCLUSIVE_FLAGS_RET(FLAG_STEAL_VM, FLAG_EXPECT_FAILURE, -1);
+    VIR_EXCLUSIVE_FLAGS_RET(FLAG_STEAL_VM, FLAG_EXPECT_PARSE_ERROR, -1);
     return 0;
 }
 
@@ -842,7 +844,8 @@ mymain(void)
         if (virTestRun("QEMU XML-2-ARGV " name, \
                        testCompareXMLToArgv, &info) < 0) \
             ret = -1; \
-        if (virTestRun("QEMU XML-2-startup-XML " name, \
+        if (((flags) & FLAG_STEAL_VM) && \
+            virTestRun("QEMU XML-2-startup-XML " name, \
                        testCompareXMLToStartupXML, &info) < 0) \
             ret = -1; \
         virObjectUnref(info.qemuCaps); \