gnu: Reference the inherited inputs values.

This commit was made by running this command:

  sed -e's/modify-inputs (package-\([a-z-]*\)inputs [a-zA-Z0-9-]\+)/modify-inputs \1inputs/g' -i gnu/packages/*.scm

… and then reverting individual hunks where the change would trigger unbound
variable warnings or other issues (such as ‘native-inputs’ is bound in the
body of the ‘inputs’ field, but it refers to the ‘native-inputs’ thunk defined
just above).

Change-Id: I6d94819f2809313fa1fbefc61897502ee7d66fab

gnu/packages/openstack.scm

@@ -100,7 +100,7 @@ formatters, and other extensions.")
      (native-inputs
       (list python-setuptools python-wheel))
      (propagated-inputs
-      (modify-inputs (package-propagated-inputs python-cliff)
+      (modify-inputs propagated-inputs
         (replace "python-stevedore" python-stevedore-bootstrap))))))
 
 (define-public python-debtcollector
@@ -746,7 +746,7 @@ handlers and support for context specific logging (like resource id’s etc).")
          #~(modify-phases #$phases
              (delete 'sanity-check)))))
      (propagated-inputs
-      (modify-inputs (package-propagated-inputs python-oslo-log)
+      (modify-inputs propagated-inputs
         (delete "python-oslo-config"))))))
 
 (define-public python-oslo-serialization