add libxslt1-dev to tempest required files
tempest actually needs a pretty new lxml, which means it's
going to build it from source. To do that it needs libxslt1-dev
to compile. We should be good and let devstack do this out of
the box so it works on minimal environments.
Change-Id: Ia527905c1c15fb8c6793f0ce543ad05e25a88179
diff --git a/files/apts/tempest b/files/apts/tempest
new file mode 100644
index 0000000..f244e4e
--- /dev/null
+++ b/files/apts/tempest
@@ -0,0 +1 @@
+libxslt1-dev
\ No newline at end of file