Update cassandra job to store dependencies into `dependencies_v2`

[pavolloffay]

https://github.com/jaegertracing/jaeger/pull/1328/files#diff-4ac32a78649ca5bdd8e0ba38b7006a1eR15 introduced in Jaeger 1.10. Changed dependencies table from dependencies to dependencies_v2.

The c* job should be changed to write to this new table. Note that we do not version this library, we could do some magic e.g. find out of the table dependencies_v2 exists and if yes store the result there.

@black-adder would you like to have a look at this one?