[OLINGO-379] Add gitattributes file to make tests work
[OLINGO-379] Add gitattributes file to make tests work

All test resource files are changed when commiting them to Unix line
endings. To prevent this in the case of the batch test resources we need
this gitattributes file

Huntr0/olingo-odata2,mibo/olingo-odata2,apache/olingo-odata2,songsongzheng/olingo-odata2,songsongzheng/olingo-odata2,ManuelB/olingo-odata2,ManuelB/olingo-odata2,apache/olingo-odata2,Huntr0/olingo-odata2,mibo/olingo-odata2