deleting development ddocs can delete production index files

Load 3k documents with any tool. I used cbsystest:
python cbsystest.py run workload --template "default" --ops 1000 --create 100


1) create 2 default design docs, each with same view name, and same default map functions.

2) Publish 1 of the design docs from dev to production

3) Delete the other development ddoc
   * deletes index file from disk for both ddocs

4) Querying published ddoc now reports view_merge errors:
Subset of nodes failed with the following error:
[ {
"from": "local",
"reason": "Undefined set view `default` for `_design/ddoc1` design document."
}, {
"from": "http://172.20.10.3:9501/_view_merge/?limit=10",
"reason": "{<<\"unknown_error\">>,<<\"view_undefined\">>}"
} ]


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