Amend python pkgs for debian-based distros

Drop python2 packages that are no longer needed. Replace other py2 pkgs
with their py3 variant.

Change-Id: Id5fc11d1ae0a7daf439c7d72f831f298f5d0ce31
diff --git a/files/debs/general b/files/debs/general
index df872a0..9f9d57c 100644
--- a/files/debs/general
+++ b/files/debs/general
@@ -27,9 +27,6 @@
 openssl
 pkg-config
 psmisc
-python2.7
-python-dev
-python-gdbm # needed for testr
 tar
 tcpdump
 unzip
diff --git a/files/debs/keystone b/files/debs/keystone
index fd0317b..1cfa6ff 100644
--- a/files/debs/keystone
+++ b/files/debs/keystone
@@ -2,5 +2,5 @@
 libldap2-dev
 libsasl2-dev
 memcached
-python-mysqldb
+python3-mysqldb
 sqlite3
diff --git a/files/debs/ldap b/files/debs/ldap
index aa3a934..54896bb 100644
--- a/files/debs/ldap
+++ b/files/debs/ldap
@@ -1,3 +1,3 @@
 ldap-utils
-python-ldap
+python3-ldap
 slapd
diff --git a/files/debs/n-cpu b/files/debs/n-cpu
index 636644f..54d6fa3 100644
--- a/files/debs/n-cpu
+++ b/files/debs/n-cpu
@@ -5,7 +5,7 @@
 lvm2 # NOPRIME
 netcat-openbsd
 open-iscsi
-python-guestfs # NOPRIME
+python3-guestfs # NOPRIME
 qemu-utils
 sg3-utils
 sysfsutils
diff --git a/files/debs/neutron-common b/files/debs/neutron-common
index b269f63..e548396 100644
--- a/files/debs/neutron-common
+++ b/files/debs/neutron-common
@@ -9,7 +9,7 @@
 libmysqlclient-dev
 mysql-server #NOPRIME
 postgresql-server-dev-all
-python-mysqldb
+python3-mysqldb
 rabbitmq-server # NOPRIME
 radvd # NOPRIME
 sqlite3
diff --git a/files/debs/nova b/files/debs/nova
index e5110e9..dce8f6a 100644
--- a/files/debs/nova
+++ b/files/debs/nova
@@ -16,7 +16,7 @@
 mysql-server # NOPRIME
 parted
 pm-utils
-python-mysqldb
+python3-mysqldb
 qemu # dist:wheezy,jessie NOPRIME
 qemu-kvm # NOPRIME
 rabbitmq-server # NOPRIME