Revert "Use integer not decimal class for numeric columns with no scale."
Revert "Use integer not decimal class for numeric columns with no scale."

Seems like unspecified scale in Oracle can mean different things
to different people. Need to find a way to make configurable in
the future.

This reverts commit 468649a776e8eab513eba97d2680bea7f9dc57d0.

keeguon/activerecord-jdbc-adapter,bruceadams/activerecord-jdbc-adapter,bruceadams/activerecord-jdbc-adapter,jruby/activerecord-jdbc-adapter,keeguon/activerecord-jdbc-adapter,keeguon/activerecord-jdbc-adapter,jruby/activerecord-jdbc-adapter,jruby/activerecord-jdbc-adapter,kares/activerecord-jdbc-adapter,kares/activerecord-jdbc-adapter,atambo/activerecord-jdbc-adapter,atambo/activerecord-jdbc-adapter,kares/activerecord-jdbc-adapter,bruceadams/activerecord-jdbc-adapter,atambo/activerecord-jdbc-adapter