Add --translate option
Add --translate option

This option will control column names mapping.
For example someone will be able to do:

--translate <source column name1>:<target column name1>,<source column name 2>:<target column name2>

to make sstableloader translate <source column name1> into
<target column name1> and <source column name2> into
<target column name2>.

Signed-off-by: Piotr Jastrzebski <2c0eb4a25a7cde333ff2d0860cb06051925fd74f@scylladb.com>

scylladb/scylla-tools-java,scylladb/scylla-tools-java,scylladb/scylla-tools-java,scylladb/scylla-tools-java