Handle uwsgi install for CentOS/RHEL

Change-Id: Ifa876b3e5f89258f40055fa7ce03f5e9c601771c

Author: Federico Ressi

lib/apache

@@ -100,7 +100,7 @@ function install_apache_uwsgi {
                         uwsgi-plugin-python \
                         uwsgi-plugin-python3 \
                         libapache2-mod-proxy-uwsgi
-    elif [[ $os_VENDOR == "Fedora" ]]; then
+    elif is_fedora; then
         # Note httpd comes with mod_proxy_uwsgi and it is loaded by
         # default; the mod_proxy_uwsgi package actually conflicts now.
         # See:
@@ -114,9 +114,7 @@ function install_apache_uwsgi {
                         uwsgi-python3 \
                         apache2-mod_uwsgi
     else
-        # Centos actually has the module in epel, but there was a big
-        # push to disable epel by default. As such, compile from source
-        # there.
+        # Compile uwsgi from source.
         local dir
         dir=$(mktemp -d)
         pushd $dir