doc: update distro information and cloud-init users

- centralize the information about the default cloud-init users
  for various distributions to point to the existing specialized
  page;
- remove all CentOS 6 and Ubuntu 12.04 (Precise) references, and
  do not refer to Ubuntu 14.04 for the vanilla plugin;
- add Ubuntu 16.04 (Xenial) details when needed;
- update the pointers to few packages.

Change-Id: I4654e6ec2821bcec5207f41b93c5d0f0633ba18c
This commit is contained in:
Luigi Toscano 2018-09-13 23:05:20 +02:00
parent 7e03ad16c5
commit e961cbef15

@ -41,17 +41,8 @@ MapR plugin needs an image to be tagged in Sahara Image Registry with
two tags: 'mapr' and '<MapR version>' (e.g. '5.2.0.mrv2').
The default username specified for these images is different for each
distribution:
+--------------+------------+
| OS | username |
+==============+============+
| Ubuntu 14 | ubuntu |
+--------------+------------+
| CentOS 6 | cloud-user |
+--------------+------------+
| CentOS 7 | centos |
+--------------+------------+
distribution. For more information, refer to the
:doc:`registering-image` section.
Hadoop Version Support
----------------------