Fixup pbr in LIBS_FROM_GIT

Change-Id: I32594f30a13c0757cc918c8a5e54ae182e985693
diff --git a/lib/infra b/lib/infra
index 4cc2596..585e9b4 100644
--- a/lib/infra
+++ b/lib/infra
@@ -30,6 +30,12 @@
 # install_infra() - Collect source and prepare
 function install_infra {
     local PIP_VIRTUAL_ENV="$REQUIREMENTS_DIR/.venv"
+    # bring down global requirements
+    git_clone $REQUIREMENTS_REPO $REQUIREMENTS_DIR $REQUIREMENTS_BRANCH
+    [ ! -d $PIP_VIRTUAL_ENV ] && virtualenv $PIP_VIRTUAL_ENV
+    # We don't care about testing git pbr in the requirements venv.
+    PIP_VIRTUAL_ENV=$PIP_VIRTUAL_ENV pip_install -U pbr
+    PIP_VIRTUAL_ENV=$PIP_VIRTUAL_ENV pip_install $REQUIREMENTS_DIR
 
     # Install pbr
     if use_library_from_git "pbr"; then
@@ -40,12 +46,6 @@
         # in via system packages.
         pip_install "-U" "pbr"
     fi
-
-    # bring down global requirements
-    git_clone $REQUIREMENTS_REPO $REQUIREMENTS_DIR $REQUIREMENTS_BRANCH
-    [ ! -d $PIP_VIRTUAL_ENV ] && virtualenv $PIP_VIRTUAL_ENV
-    PIP_VIRTUAL_ENV=$PIP_VIRTUAL_ENV pip_install -U pbr
-    PIP_VIRTUAL_ENV=$PIP_VIRTUAL_ENV pip_install $REQUIREMENTS_DIR
 }
 
 # Restore xtrace