* Fix ConfigMap name clash if env_file name is equal #2000
* Generate envFrom instead of single env entries from env_file entries #1999
* Fix failing test fixture outputs
#### What type of PR is this?
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Add one of the following kinds:
/kind bug
/kind documentation
/kind feature
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/kind cleanup
#### What this PR does / why we need it:
Removes the network policy annotation which is not needed (we are not
generating network policy)
#### Which issue(s) this PR fixes:
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*Automatically closes linked issue when PR is merged.
Usage: `Fixes #<issue number>`, or `Fixes (paste link of issue)`.
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Fixes https://github.com/kubernetes/kompose/issues/1759
#### Special notes for your reviewer:
* fix: env_file configmap name length
fix filename to configmap name transformer
* fix configmap names in tests
* add env-multiple fixture and test
* adjust to test
* disable env-multiple suite
