eliminate TEST_ONLY differentiation

devstack is a development and test environment, but by default we were
only installing the runtime dependencies. We should install all the
testing required packages as well.

Change-Id: I7c95927b9daad15766aac9d1276b10ca62efb24c
diff --git a/files/rpms/general b/files/rpms/general
index eac4ec3..d74ecc6 100644
--- a/files/rpms/general
+++ b/files/rpms/general
@@ -5,7 +5,7 @@
 gcc
 gcc-c++
 git-core
-graphviz # testonly - docs
+graphviz # needed only for docs
 openssh-server
 openssl
 openssl-devel # to rebuild pyOpenSSL if needed