remove gratuitous python packages

With pip + upper-constraints we're nearly always over installing all
python packages because we no longer support a range, we support
*exactly* one version.

This removes a bunch of the gratuitous package installs which we're
going to install over, lxml, numpy, libvirt. All of these we had
coming from packages in the past for speed concerns, but upper
constraints removes that.

It also ensures that all the headers to build all those are in
general, so they are guarunteed available at all times.

Change-Id: Ia76de730d65c84d81c4fb2c980ae1b4d595f9f5b

files/debs/general

@@ -20,8 +20,10 @@ python2.7
 python-gdbm # needed for testr
 bc
 libyaml-dev
-libffi-dev
+libffi-dev # for pyOpenSSL
 libssl-dev # for pyOpenSSL
+libxml2-dev  # lxml
+libxslt1-dev  # lxml
 gettext  # used for compiling message catalogs
 openjdk-7-jre-headless  # NOPRIME
 pkg-config

files/debs/keystone

@@ -1,4 +1,3 @@
-python-lxml
 sqlite3
 python-mysqldb
 python-mysql.connector

files/debs/n-novnc

@@ -1 +0,0 @@
-python-numpy

files/debs/nova

@@ -8,7 +8,8 @@ libmysqlclient-dev
 mysql-server # NOPRIME
 python-mysqldb
 python-mysql.connector
-python-lxml # needed for glance which is needed for nova --- this shouldn't be here
+libxml2-dev # needed for building lxml
+libxslt1-dev
 gawk
 iptables
 ebtables
@@ -25,7 +26,3 @@ curl
 genisoimage # required for config_drive
 rabbitmq-server # NOPRIME
 socat # used by ajaxterm
-python-libvirt # NOPRIME
-python-libxml2
-python-numpy # used by websockify for spice console
-python-m2crypto