Fix namenode parameter to take a string

Change-Id: Iff09385aa10068fd33a343796e39ea11fb9e720c
Removed put

Change-Id: I55cf03784d89deb6b79547d87ca9d725d5194474
Fix python 2.6 error

Change-Id: Iad68bfca139371141998754f7408209e64993ee7
Updated doc version

Change-Id: I592e7cd5d71f7ed6336ea7f144191dc082bb3118
Fixed test

Change-Id: I6c38e9ebeccb586cfe0f7fcbd1a5bba06a5680c0
Updated docs regarding CRC checks

Change-Id: Ia93ed065198d18d70ecd1af8a31a687d3588a071
* namenode parameter should be a string
* added a default port of 8020
* corrected tests

fix typo