[MNG-5812] Project base dir not fully working in Cygwin
[MNG-5812] Project base dir not fully working in Cygwin

Converted project base dir from Cygwin path to Windows path before
executing Maven.

keith-turner/maven,dsyer/maven,pkozelka/maven,josephw/maven,kidaa/maven-1,olamy/maven,cstamas/maven,skitt/maven,vedmishr/demo1,josephw/maven,changbai1980/maven,josephw/maven,pkozelka/maven,kidaa/maven-1,ChristianSchulte/maven,mizdebsk/maven,barthel/maven,mcculls/maven,wangyuesong0/maven,skitt/maven,karthikjaps/maven,aheritier/maven,trajano/maven,skitt/maven,apache/maven,njuneau/maven,lbndev/maven,atanasenko/maven,atanasenko/maven,barthel/maven,changbai1980/maven,barthel/maven,olamy/maven,wangyuesong/maven,mizdebsk/maven,rogerchina/maven,likaiwalkman/maven,atanasenko/maven,changbai1980/maven,xasx/maven,vedmishr/demo1,cstamas/maven,karthikjaps/maven,trajano/maven,apache/maven,rogerchina/maven,pkozelka/maven,rogerchina/maven,njuneau/maven,karthikjaps/maven,wangyuesong0/maven,cstamas/maven,wangyuesong0/maven,mcculls/maven,mizdebsk/maven,wangyuesong/maven,dsyer/maven,Mounika-Chirukuri/maven,xasx/maven,xasx/maven,stephenc/maven,lbndev/maven,njuneau/maven,likaiwalkman/maven,aheritier/maven,mcculls/maven,stephenc/maven,apache/maven,stephenc/maven,keith-turner/maven,aheritier/maven,lbndev/maven,kidaa/maven-1,wangyuesong/maven,Mounika-Chirukuri/maven,vedmishr/demo1,olamy/maven,ChristianSchulte/maven,likaiwalkman/maven,trajano/maven,ChristianSchulte/maven,dsyer/maven,Mounika-Chirukuri/maven,keith-turner/maven