changed rangePartition properties to long because in D2 actual proper…

…ties, it's long not int

and bump pegasus

RB=307113

Bumping the version of pegasus.

bump pegasus to 1.15.20 + remove flaky test

RB=304004

Bump pegasus version to 1.15.19

bump version for release of pegasus 1.15.18

Version bump

Bump pegasus version

Releasing new version of Pegasus.

bumping version

Updated the CHANGELOG and bumped the version number