Update doc config and installation information

The conf.py file had the wrong date, we moved this to 2019 for correctness.

The installation process only references using yum and dnf now.

Change-Id: I35174d582c4331b1aa83bf1bc380101aae0ff34c
Signed-off-by: Kevin Carter <kecarter@redhat.com>

doc/source/conf.py

@@ -42,7 +42,7 @@ master_doc = 'index'
 
 # General information about the project.
 project = u'tripleo-ansible'
-copyright = u'2013, OpenStack Foundation'
+copyright = u'2019, OpenStack Foundation'
 
 # If true, '()' will be appended to :func: etc. cross-reference text.
 add_function_parentheses = True

doc/source/installation.rst

@@ -2,15 +2,11 @@
 Installation
 ============
 
-At the command line::
+At the command line using `yum`::
 
-    $ pip install tripleo-ansible
-
-Or, if you have virtualenvwrapper installed::
+    $ yum install tripleo-ansible
 
-    $ python -m virtualenv tripleo-ansible
-    $ pip install tripleo-ansible
 
-Or, using the package manager::
+At the command line using `dnf`::
 
-    $ yum install tripleo-ansible
+    $ dnf install tripleo-ansible