Fix pip-and-virtualenv to work with python3

We are explicitly calling python in this element which does not work on
systems which only have python3.

Change-Id: Ia730850a48e2478fd5461710a9d2619408725cd8

elements/pip-and-virtualenv/element-deps

@@ -1,3 +1,4 @@
+dib-python
 install-types
 package-installs
 source-repositories

elements/pip-and-virtualenv/install.d/pip-and-virtualenv-source-install/10-install-pip

@@ -19,7 +19,7 @@ if [[ $DISTRO_NAME =~ (centos|fedora) ]]; then
     ${YUM:-yum} install -y python-virtualenv python-pip python-setuptools
 
     # install pip; this overwrites packaged pip
-    python /tmp/get-pip.py
+    /usr/local/bin/dib-python /tmp/get-pip.py
 
     # pip and setuptools are closely related; we want to ensure the
     # latest for sanity.  Because distro packages don't include enough
@@ -50,6 +50,6 @@ if [[ $DISTRO_NAME =~ (centos|fedora) ]]; then
     fi
     echo "exclude=python-virtualenv,python-pip,python-setuptools" >> ${conf}
 else
-    python /tmp/get-pip.py
+    /usr/local/bin/dib-python /tmp/get-pip.py
     pip install virtualenv
 fi

elements/pip-and-virtualenv/package-installs.yaml

@@ -2,7 +2,22 @@
 # early enough because pip depends on it.
 python-xml:
   phase: pre-install.d
+  dib_python_version: 2
 python-pip:
   installtype: package
+  dib_python_version: 2
+python3-pip:
+  installtype: package
+  dib_python_version: 3
 python-virtualenv:
   installtype: package
+  dib_python_version: 2
+python3-virtualenv:
+  installtype: package
+  dib_python_version: 3
+python-dev:
+  installtype: source
+  dib_python_version: 2
+python3-dev:
+  installtype: source
+  dib_python_version: 3

elements/pip-and-virtualenv/pkg-map

@@ -2,10 +2,17 @@
   "family": {
     "gentoo": {
       "python-pip": "dev-python/pip",
-      "python-virtualenv": "dev-python/virtualenv"
+      "python-virtualenv": "dev-python/virtualenv",
+      "python3-dev": "dev-lang/python"
     },
     "suse": {
-      "python-xml": "python-xml"
+      "python-xml": "python-xml",
+      "python2-dev": "python2-devel",
+      "python3-dev": "python3-devel"
+    },
+    "redhat": {
+      "python2-dev": "python2-devel",
+      "python3-dev": "python3-devel"
     }
   },
   "default": {