Release Jetpants 0.7.4: * Clean up which objects have associated credentials. * Clean up connection methods in DB class, especially regarding user-   switching and credential usage. * Add a Topology#refresh method, for use in long-running scripts that need   to pick up state changes made by another copy of Jetpants. * Allow DB#mysql_root_cmd to optionally use or not use the schema name   on the command line. (This has implications for users of filtered   replication.) * The commands "jetpants shard_split_child_writes" and "jetpants   shard_split_cleanup" are now smart enough to auto-detect which shard   to operate on, if only one shard is in the middle of a split   operation. * "jetpants shard_cutover" now performs validations regarding count of   remaining spare nodes. * Add new commands "jetpants summary", "jetpants pools", "jetpants   pools_compact" * Remove commands "jetpants show_slaves", "jetpants show_master",   "jetpants node_info", and remove dependency on terminal-table * Bug fixes for the simple_tracker example plugin relating to "jetpants   destroy_slave", as well as "jetpants promotion" with offline master * Bug fix for "jetpants promotion" when master is offline and using   options --demote or --promote on command line instead of prompts
Release Jetpants 0.7.4:
* Clean up which objects have associated credentials.
* Clean up connection methods in DB class, especially regarding user-
  switching and credential usage.
* Add a Topology#refresh method, for use in long-running scripts that need
  to pick up state changes made by another copy of Jetpants.
* Allow DB#mysql_root_cmd to optionally use or not use the schema name
  on the command line. (This has implications for users of filtered
  replication.)
* The commands "jetpants shard_split_child_writes" and "jetpants
  shard_split_cleanup" are now smart enough to auto-detect which shard
  to operate on, if only one shard is in the middle of a split
  operation.
* "jetpants shard_cutover" now performs validations regarding count of
  remaining spare nodes.
* Add new commands "jetpants summary", "jetpants pools", "jetpants
  pools_compact"
* Remove commands "jetpants show_slaves", "jetpants show_master",
  "jetpants node_info", and remove dependency on terminal-table
* Bug fixes for the simple_tracker example plugin relating to "jetpants
  destroy_slave", as well as "jetpants promotion" with offline master
* Bug fix for "jetpants promotion" when master is offline and using
  options --demote or --promote on command line instead of prompts

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