Have hc run set the DNA hash in the conductor config

[lucksus]

PR summary

This was missed when adding strict config checks in #1335.

hc run creates a conductor config to run the given DNA in the working directory. In order for this config to pass the strict hash checks, hc needs to set the right DNA hash in that config.

Fixes #1594

changelog

Please check one of the following, relating to the CHANGELOG-UNRELEASED.md

• this is a code change that effects some consumer (e.g. zome developers) of holochain core so it is added to the CHANGELOG-UNRELEASED.md (linked above), with the format - summary of change [PR#1234](https://github.com/holochain/holochain-rust/pull/1234)
• this is not a code change, or doesn't effect anyone outside holochain core development