Added the replaceEnvironVariables() method.
Added the replaceEnvironVariables() method.

csuideal/log4cplus,ccpaging/log4cplus,hunter-packages/log4cplus,csuideal/log4cplus,hunter-packages/log4cplus,csuideal/log4cplus,csuideal/log4cplus,ccpaging/log4cplus,ccpaging/log4cplus,hunter-packages/log4cplus,hunter-packages/log4cplus,ccpaging/log4cplus