Wikistats now expects ip field with country code

  * Updated code in SquidCountArchiveProcessLogRecord.pm to
    expect country code in $fields[4] like "88.88.88.88|US"
  * Updated tests to cope with this change
  * Updated another time t/CommonConfig.pm to use ENV{WORKSPACE} needed
    by jenkins

Change-Id: I9856f648a6e8013d264ef9c05d5a571d0703040f