Removing the override annotation

Removed it from interface implementations
Fixing usage of IOException for 1.5
Fixing checkstyle warnings
Bump version
Merge branch 'cg/MINT-990_compilation_issues_in_1.5' of msgit.internal.machines:java-checkout into v1.1

* 'cg/MINT-990_compilation_issues_in_1.5' of msgit.internal.machines:java-checkout:
  Bump version
  Fixing checkstyle warnings
  Fixing usage of IOException for 1.5
  Removing the override annotation