The current checking does version `1.x' is less than `1.4' this will fail if x has greater than 1 digit, since x > 4, however `1.x` < `1.4`

It fails in my system since I have version `1.10` :P

Author: MechCoder <manojkumarsivaraj334@gmail.com>

Closes #6579 from MechCoder/np_ver and squashes the following commits:

15430f8 [MechCoder] fix syntax error
893fb7e [MechCoder] remove equal to
e35f0d4 [MechCoder] minor
e89376c [MechCoder] Better checking
22703dd [MechCoder] [SPARK-8032] Make version checking for NumPy in MLlib more robust