Initial revision of gmt BedToIntervalList wrapper for Picard tool.

Initial revision of gmt BedToIntervalList wrapper for Picard tool.

The hard-coded path to picard 1.123 should be removed once @iferguson90 changes are made to G:M:T::Picard related to package name changes for version 1.123
Same comment as [here](https://github.com/genome/genome/pull/131#discussion-diff-19434084).