PowerFlex documentation contains invalid paths

The latest documentation for Dell EMC PowerFlex driver
(rebranded from VxFlex OS) contains invalid paths for
the connector configuration file that can make it
impossible to perform attach/detach operations.

Change-Id: I27921a5641abab3815d8ce7404f680c98e163520
Closes-Bug: #1913578

doc/source/configuration/block-storage/drivers/dell-emc-powerflex-driver.rst

@@ -228,16 +228,16 @@ Before using attach/detach volume operations PowerFlex connector must be
 properly configured. On each node where PowerFlex SDC is installed do the
 following:
 
-#. Create ``/opt/dellemc/powerflex/openstack/connector.conf`` if it does not
+#. Create ``/opt/emc/scaleio/openstack/connector.conf`` if it does not
    exist.
 
    .. code-block:: console
 
-     $ mkdir -p /opt/dellemc/powerflex/openstack
-     $ touch /opt/dellemc/powerflex/openstack/connector.conf
+     $ mkdir -p /opt/emc/scaleio/openstack
+     $ touch /opt/emc/scaleio/openstack/connector.conf
 
 #. For each PowerFlex section in the ``cinder.conf`` create the same section in
-   the ``/opt/dellemc/powerflex/openstack/connector.conf`` and populate it with
+   the ``/opt/emc/scaleio/openstack/connector.conf`` and populate it with
    passwords. Example:
 
    .. code-block:: ini
@@ -540,11 +540,11 @@ Using PowerFlex Storage with a containerized overcloud
 
       parameter_defaults:
         NovaComputeOptVolumes:
-          - /opt/dellemc/powerflex:/opt/dellemc/powerflex
+          - /opt/emc/scaleio:/opt/emc/scaleio
         CinderVolumeOptVolumes:
-          - /opt/dellemc/powerflex:/opt/dellemc/powerflex
+          - /opt/emc/scaleio:/opt/emc/scaleio
         GlanceApiOptVolumes:
-          - /opt/dellemc/powerflex:/opt/dellemc/powerflex
+          - /opt/emc/scaleio:/opt/emc/scaleio
 
 
    Name it whatever you like, e.g. ``powerflex_volumes.yml``.