Honor $M2_HOME in titan-hbase-096 shell script
Honor $M2_HOME in titan-hbase-096 shell script

Use $M2_HOME if it is set in the process environment, otherwise
default to calling "mvn" and letting $PATH sort it out as before

jankotek/titan,wangbf/titan,mwpnava/titan,tomersagi/titan,nvoron23/titan,dylanht/titan,anuragkh/titan,englishtown/titan,thinkaurelius/titan,elkingtonmcb/titan,kangkot/titan,evanv/titan,hortonworks/titan,nvoron23/titan,amcp/titan,tomersagi/titan,ThiagoGarciaAlves/titan,kalatestimine/titan,wangbf/titan,pluradj/titan,kangkot/titan,CYPP/titan,hortonworks/titan,kalatestimine/titan,evanv/titan,samanalysis/titan,wangbf/titan,mwpnava/titan,evanv/titan,amcp/titan,fengshao0907/titan,elkingtonmcb/titan,mbrukman/titan,samanalysis/titan,kalatestimine/titan,kangkot/titan,englishtown/titan,nvoron23/titan,thinkaurelius/titan,dylanht/titan,pluradj/titan,hortonworks/titan,banjiewen/titan,tomersagi/titan,kalatestimine/titan,ThiagoGarciaAlves/titan,thinkaurelius/titan,mbrukman/titan,qiuqiyuan/titan,CYPP/titan,dylanht/titan,xlcupid/titan,jamestyack/titan,mbrukman/titan,elkingtonmcb/titan,tomersagi/titan,pluradj/titan,graben1437/titan,nvoron23/titan,mwpnava/titan,qiuqiyuan/titan,jamestyack/titan,jankotek/titan,kalatestimine/titan,CYPP/titan,fengshao0907/titan,anuragkh/titan,anuragkh/titan,mbrukman/titan,elubow/titan,banjiewen/titan,ThiagoGarciaAlves/titan,ThiagoGarciaAlves/titan,fengshao0907/titan,graben1437/titan,amcp/titan,graben1437/titan,anuragkh/titan,wangbf/titan,thinkaurelius/titan,elkingtonmcb/titan,qiuqiyuan/titan,mbrukman/titan,englishtown/titan,evanv/titan,graben1437/titan,hortonworks/titan,elkingtonmcb/titan,jankotek/titan,banjiewen/titan,qiuqiyuan/titan,jamestyack/titan,jamestyack/titan,hortonworks/titan,elubow/titan,elubow/titan,samanalysis/titan,amcp/titan,englishtown/titan,CYPP/titan,fengshao0907/titan,xlcupid/titan,banjiewen/titan,ThiagoGarciaAlves/titan,xlcupid/titan,qiuqiyuan/titan,mwpnava/titan,jankotek/titan,xlcupid/titan,fengshao0907/titan,kangkot/titan,pluradj/titan,jamestyack/titan,kangkot/titan,evanv/titan,jankotek/titan,samanalysis/titan,dylanht/titan,tomersagi/titan,elubow/titan,xlcupid/titan,mwpnava/titan,wangbf/titan,anuragkh/titan