Remove obsolete options.

vtkPVOptions has collected a horde of obsolete options that were no longer used
or applicable. Cleaned those up.

Change-Id: Ia7b2e400c57f6eb80f66066c90a64de6bcc2dc69
Cleanup the logic for specifying host/port names.

Cleaning up the logic for specifying host/port names on the server processes to
minimize the ambiguity.

Change-Id: I0ca19d0e32fb582b17600215bdfbbb5810de481c
Fix logic to connect to renderserver nodes.

When running in data-server/render-server mode, the data-server wasn't getting
the information about the hostnames for the render-server nodes correctly and
hence always ended up connecting to "localhost". This fixes that. Now, the
information about the render-server nodes' hostnames is relayed to the
data-server correctly. The render-server nodes' hostnames are determine using
plaform specific API. At the same time, argument --hostname is provided to
override the platform specific hostname for the process (useful for debugging, as
well).

Change-Id: Idf7929b5a7cc5c800579e353418e0a9066f79f5e
Merge topic 'cleanup_commandline_options' into next

057e9ce Fix logic to connect to renderserver nodes.
fb5e7f5 Cleanup the logic for specifying host/port names.
cfe6adf Remove obsolete options.
Fix string names for processes in pvx files.

Expanding the string-names in pvx file for process types to include
non-hyphenated versions e.g. dataserver and data-server can now be used
interchangeably.

Change-Id: Id1191cd33fd3ba6a0697068b9d1d732a21049580
Merge topic 'cleanup_commandline_options' into next

28f3d47 Fix string names for processes in pvx files.