IZ179: make sure changes to global testsuite config files do not overwrite more recent versions

[joga]

[Imported from gridengine issuezilla ​http://gridengine.sunsource.net/issues/show_bug.cgi?id=179]

        Issue #:      179             Platform:     All           Reporter: joga (joga)
       Component:     testsuite          OS:        All
     Subcomponent:    framework       Version:      current          CC:    None defined
        Status:       NEW             Priority:     P3
      Resolution:                    Issue type:    ENHANCEMENT
                                  Target milestone: milestone 1
      Assigned to:    issues@testsuite
      QA Contact:     joga
          URL:
       * Summary:     make sure changes to global testsuite config files do not overwrite more recent versions
   Status whiteboard:
      Attachments:

     Issue 179 blocks:
   Votes for issue 179:     Vote for this issue


   Opened: Tue Mar 11 09:18:00 -0700 2008 
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When making modifications to the global testsuite configuration files (host
config, user config, database config),
it can happen, that someone else also modified such a file in the meantime,
esp. when entering the configuration menu in a testsuite that is already running
for some time.

The probability of such a race condition can be limited, by
- rereading the configuration before entering the configuration dialog
- before writing, make sure the file hasn't be modified in the meantime