Bug 1317784

Description of problem:
 when running "oc rsh", geometry of the console is not passed to the container, so the shell works with default 80×25 geometry which causes scrollback issues in programs like "less"

Version-Release number of selected component (if applicable):
# oc version
oc v3.1.1.6-21-gcd70c35
kubernetes v1.1.0-origin-1107-g4c8e6f4

How reproducible:
always

Steps to Reproduce:
1. oc rsh <pod>
2. set TERM manually to enable scrollback (bz#1317778)
 export TERM=xterm
3. less /path/to/log

Actual results:
 file opens up, but when trying to scroll back the screen is corrupted as the actual terminal size is different from what the container thinks.

Expected results:
 scrollback works properly in less, other command-line tools also work correctly to make troubleshooting easier.

Additional info:

 Here's the geometry reported by "stty -a" in the container
  speed 38400 baud; rows 0; columns 0; line = 0;

 To work around this issue I did this:
  1) find out the geometry of the shell by running "stty -a" before "oc rsh"
  2) set the same geometry in the container 
    stty rows 62 columns 224
 
 this made less work properly, however it needs to be done each time and will not catch the changes in terminal window size.