ignite.sh|bat and related scripts version check is not compatible with OpenJDK

The version check used in various startup and utility scripts incorrectly flags OpenJDK as inappropriate due to a improper check on the version string.

On line 66 of the following file, OpenJDK will not be detected because the line starts with openjdk rather than java (example attached)

https://git-wip-us.apache.org/repos/asf?p=ignite.git;a=blob;f=bin/include/functions.sh;h=8f4570bd420d9e5c3815a6feb40e86c3986234be;hb=HEAD