SERVER-14147 make index_multi.js retry on connection failure

(cherry picked from commit 8c98fd5efa6c76d6b7b1d51862b599f2f93d5f85)

Conflicts:
	jstests/noPassthroughWithMongod/index_multi.js
SERVER-14147 fix index_multi.js retry by passing the correct noConnect value

(cherry picked from commit 600ec8db2b83ae5e2fd21d3da266af7d65b2d0c1)
Merge remote-tracking branch 'upstream/v2.6' into v2.6