avocado.spec: make subpackages depend on specific version

It just makes sense that the subpackages of Avocado depend on the same
version.  This will avoid accidental mixing and matching of different
package versions.

Signed-off-by: Cleber Rosa <[email protected]>

avocado.spec

@@ -88,7 +88,7 @@ selftests/run
 
 %package plugins-output-html
 Summary: Avocado HTML report plugin
-Requires: avocado, pystache
+Requires: avocado == %{version}, pystache
 
 %description plugins-output-html
 Adds to avocado the ability to generate an HTML report at every job results
@@ -101,7 +101,7 @@ arbitrary filesystem location.
 
 %package examples
 Summary: Avocado Test Framework Example Tests
-Requires: avocado
+Requires: avocado == %{version}
 
 %description examples
 The set of example tests present in the upstream tree of the Avocado framework.