New release 2.10.6

Signed-off-by: Oleg Drokin <green@whamcloud.com>

LUSTRE-VERSION-GEN

 #!/bin/sh
 
-DEFAULT_VERSION=2.10.6-RC3
+DEFAULT_VERSION=2.10.6
 LVF=LUSTRE-VERSION-FILE
 
 LF='

lustre/ChangeLog

-TBD Whamcloud
+12-12-2018 Whamcloud
        * version 2.10.6
        * See https://wiki.whamcloud.com/display/PUB/Lustre+Support+Matrix
          for currently supported client and server kernel versions.