hadoop 2.6.0

Updated Hadoop formula to 2.6.0

Closes #34704.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
i2util 1.2 (new formula)

This is a dependency for owamp-3.4 and bwctl

Note: i2util includes binaries "aespasswd" and "pfstore" which were
previously in owamp-3.3, and therefore will generate link conflicts
with that package.

Closes #34705.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
i2util: add 1.2 bottle.
bwctl 1.5.2-10 (new formula)
bwctl: add 1.5.2-10 bottle.