SERVER-13057 push shell write errors more in line with other drivers
SERVER-10026 fix query leak during certain error conditions
SERVER-13263 Temporarily disable balancer on testshard1.js when not issuing the aggregate command
SERVER-13210: include nModified for all mongod write commands
SERVER-13262 have mr_drop.js run on a unique DB to avoid parallel test failures
SERVER-13184 with rooted OR query plan sub-queries independently and combine
Merge remote-tracking branch 'upstream/master'