Fix the schema that is output with the schema walker command

Missed a semicolon at the end of the schema text in a previous patch.
If you use  `bin/cqlsh -f <schema-file` you'll get an error "Incomplete
statement at end of file". This patch fixes that.
Merge branch 'master' into SchemaOutputFix
Merge pull request #113 from iParadigms/SchemaOutputFix

Fix the schema that is output with the schema walker command