SERVER-8292 SERVER-7843 SERVER-7087 Make tojsonObject handle Error objects

Use the toString() method of Error (and derived) objects to convert them
to strings in tojson() and related functions.  These objects have no
enumerable properties, and so display as "{ }" if not handled specially.
Create local copy of temporary cursor currKey

Temporary value returned by cursor->currKey() may be overwritten
before we can iterate over it, so copy it first.
SERVER-8263 Use member configs in local.slaves
SERVER-8070 Make timeout longer for slow buildbot
SERVER-1606: don't duplicate update names
buildbot - fix dbpath name
Revert "SERVER-8263 Use member configs in local.slaves"

This reverts commit 9b3a4ce065c1aea42473d8b6489f642488ac2b4e.
fix yielding regression between readers and writers

After version 2.2, the sleep for yielding reader threads was removed. This caused
reader threads to be able to regain their shared lock before a writer could
gain an exclusive lock, even when there was a queue of pending writers.
By adding back this sleep of a tiny amount, this has the effect of ending the
reader thread's quantum, and thus makes our lock implementation appropriately
writer-greedy.

This should fix query_yield1.js and query_yield2.js, as well as other assorted
unit test failures.
not so big so Windows can finish in a reasonable amount of time
SERVER-8360 - only run dur_passthrough.js on linux 64bit non-debug builds.
SERVER-6450: when reporting pages in memory, give time as well
Allow db.serverStatus() to take arguments that pipe through to command
Add node startup information to the local DB jstests - SERVER-7451
Merge pull request #362 from rozza/SERVER-7451

SERVER-7451: jstest for startup_log information
revert: Add node startup information to the local DB jstests - SERVER-7451
SERVER-8303 Fix $push with a single $each clause behavior.
SERVER-8381 raise timeout in cursor timeout test
SERVER-8203: replication metrics
remove Counter64.set(...) -- missed during cleanup
SERVER-8203: replication metrics test fix