Update study configuration during execution

[jwhite242]

This feature adds the ability to change some of a study's configuration during execution, including:

• rlimit (restart limit)
• throttle
• sleep

Implementation works like cancel, taking paths to executing study workspaces. Configuration parameters can be updated either via an interactive prompt for each study workspace given, or using explicit/repeated keyword arguments for each configuration parameter.

Current Limitations:

• rlimit is a per step configuration, but it is only set globally in current implementation
• If a study is no longer running, updating rlimit will not yet resume the study to account for any increases