tests: Rename domaincapsschemadata/ -> domaincapsdata/

The usual convention is to use ${foo}test.c for the test program
itself and either ${foo}data/ or ${foo}outdata/, depending on
whether it contains both input and output files or only the latter,
for the corresponding data directory.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>

tests/domaincapsdata/empty.xml

@@ -0,0 +1,16 @@
+<domainCapabilities>
+  <path>/bin/emulatorbin</path>
+  <domain>kvm</domain>
+  <machine>my-machine-type</machine>
+  <arch>x86_64</arch>
+  <cpu>
+    <mode name='host-passthrough' supported='no'/>
+    <mode name='host-model' supported='no'/>
+    <mode name='custom' supported='no'/>
+  </cpu>
+  <devices>
+  </devices>
+  <features>
+    <sev supported='no'/>
+  </features>
+</domainCapabilities>