Adding s4fs dependency
Add s4 to supported.filesystems; Remove hadoop-core bundling
Adding scm tag
Add oozie el-extension changes
Adding mysql dependency; excluding hadoop dependency in war
Add HCatURIHandler in oozie-site.xml
Merge pull request #14 from satish-mittal/branch-4.0

1) Add s4fs dependency; 2)Add mysql connector dependency; 3) Add oozie el-extension changes; 4) Add scm tag; 5) Add HCatURIHandler to oozie-site.xml