doc: Use dnf instead of yum

The yum command has been replaced by the dnf command in recent releases
of Fedora-based distributions. Use the native command instead of
the alias kept for compatibility.

Change-Id: I06fe3105b57a3f9c4ef790892c644f1efaaeece2

doc/source/contributor/apache-httpd.rst

@@ -52,11 +52,7 @@ match your system configuration (i.e. tweak the number of processes and threads)
 
 Install uwsgi.
 
-On RHEL/CentOS::
-
-    sudo yum install uwsgi-plugin-python3
-
-On Fedora::
+On RHEL/CentOS/Fedora::
 
     sudo dnf install uwsgi-plugin-python3
 

doc/source/contributor/development.environment.rst

@@ -75,7 +75,7 @@ Install the prerequisite packages.
 
 .. note::
 
-   If using RHEL and yum reports "No package python3-pip available" and "No
+   If using RHEL and dnf reports "No package python3-pip available" and "No
    package git-review available", use the EPEL software repository.
    Instructions can be found at `<http://fedoraproject.org/wiki/EPEL/FAQ#howtouse>`_.
 

doc/source/install/install-controller-rdo.rst

@@ -17,7 +17,7 @@ Install and configure components
 
    .. code-block:: console
 
-      # yum install openstack-manila python3-manilaclient
+      # dnf install openstack-manila python3-manilaclient
 
 #. Edit the ``/etc/manila/manila.conf`` file and complete the
    following actions:

doc/source/install/install-share-rdo.rst

@@ -20,7 +20,7 @@ Install and configure components
 
    .. code-block:: console
 
-      # yum install openstack-manila-share python3-PyMySQL
+      # dnf install openstack-manila-share python3-PyMySQL
 
 #. Edit the ``/etc/manila/manila.conf`` file and complete the following
    actions:
@@ -61,7 +61,7 @@ Prerequisites
 
      .. code-block:: console
 
-        # yum install lvm2 nfs-utils nfs4-acl-tools portmap targetcli
+        # dnf install lvm2 nfs-utils nfs4-acl-tools portmap targetcli
 
    * Start the LVM metadata service and configure it to start when the
      system boots:
@@ -87,7 +87,7 @@ node.
 
   .. code-block:: console
 
-     # yum install openstack-neutron openstack-neutron-linuxbridge ebtables
+     # dnf install openstack-neutron openstack-neutron-linuxbridge ebtables
 
 .. include:: common/dhss-true-mode-configuration.rst