Separate runtime dependencies and development dependencies in all the plugins gemspec

[ph]

All the dependencies for the plugins are declared as runtime dependencies.
But in reality some of the dependencies are only used to make the test run.

One of the gem with the problem is the ruby filter (https://github.com/logstash-plugins/logstash-filter-ruby)

# Gem dependencies
s.add_runtime_dependency 'logstash', '>= 1.4.0', '< 2.0.0'
s.add_runtime_dependency 'logstash-filter-date'

[suyograo]

@ph is this still an issue

[ph]

Yes this is still an issue, we will have to go through all the plugins to make the changes. I dont think we can automate it.