Move some test dependencies to compile scope.
Move some test dependencies to compile scope.

This commit modifies the pom to put kiji-schema's test jar and
fake-hbase into compile scope. This allows end-users to depend on the
KijiExpress testing framework and pick up these dependencies transitively.

Reviewed by: robertchu

kijiproject/kiji-express,kijiproject/kiji-express,kijiproject/kiji-express