SCHEDULING-1840 jetty-launcher: don't break with newer "file" versions
SCHEDULING-1840 jetty-launcher: don't break with newer "file" versions

jetty-launcher uses the "file" program to detect the type of a file.

For war files, the output used to be

  Zip archive data, at least v1.0 to extract

but with newer "file" it is

  Java Jar file data (zip)

This changes the grep string from "Zip archive" to "zip" to support
both versions.

Change-Id: I9b697ebeda8e4b866863f09344d2682c46f56157

ow2-proactive/scheduling,laurianed/scheduling,lpellegr/scheduling,zeineb/scheduling,fviale/scheduling,mbenguig/scheduling,sandrineBeauche/scheduling,mbenguig/scheduling,yinan-liu/scheduling,sgRomaric/scheduling,ShatalovYaroslav/scheduling,marcocast/scheduling,lpellegr/scheduling,zeineb/scheduling,yinan-liu/scheduling,ShatalovYaroslav/scheduling,ShatalovYaroslav/scheduling,tobwiens/scheduling,sandrineBeauche/scheduling,mbenguig/scheduling,paraita/scheduling,laurianed/scheduling,youribonnaffe/scheduling,ow2-proactive/scheduling,zeineb/scheduling,marcocast/scheduling,fviale/scheduling,paraita/scheduling,zeineb/scheduling,sgRomaric/scheduling,fviale/scheduling,ShatalovYaroslav/scheduling,sgRomaric/scheduling,mbenguig/scheduling,sandrineBeauche/scheduling,lpellegr/scheduling,youribonnaffe/scheduling,mbenguig/scheduling,tobwiens/scheduling,marcocast/scheduling,lpellegr/scheduling,mbenguig/scheduling,tobwiens/scheduling,jrochas/scheduling,ow2-proactive/scheduling,sandrineBeauche/scheduling,tobwiens/scheduling,tobwiens/scheduling,paraita/scheduling,marcocast/scheduling,sgRomaric/scheduling,jrochas/scheduling,jrochas/scheduling,sandrineBeauche/scheduling,sgRomaric/scheduling,paraita/scheduling,marcocast/scheduling,tobwiens/scheduling,zeineb/scheduling,youribonnaffe/scheduling,sgRomaric/scheduling,marcocast/scheduling,lpellegr/scheduling,lpellegr/scheduling,yinan-liu/scheduling,sandrineBeauche/scheduling,laurianed/scheduling,laurianed/scheduling,jrochas/scheduling,laurianed/scheduling,sandrineBeauche/scheduling,youribonnaffe/scheduling,youribonnaffe/scheduling,ShatalovYaroslav/scheduling,fviale/scheduling,ShatalovYaroslav/scheduling,fviale/scheduling,jrochas/scheduling,ShatalovYaroslav/scheduling,laurianed/scheduling,lpellegr/scheduling,ow2-proactive/scheduling,youribonnaffe/scheduling,yinan-liu/scheduling,yinan-liu/scheduling,paraita/scheduling,paraita/scheduling,fviale/scheduling,mbenguig/scheduling,jrochas/scheduling,sgRomaric/scheduling,fviale/scheduling,jrochas/scheduling,zeineb/scheduling,yinan-liu/scheduling,zeineb/scheduling,tobwiens/scheduling,ow2-proactive/scheduling,youribonnaffe/scheduling,ow2-proactive/scheduling,marcocast/scheduling,yinan-liu/scheduling,ow2-proactive/scheduling,paraita/scheduling,laurianed/scheduling