half of mode="eclipse.plugin" is commented out in map2pluginImpl.xsl

## Expected Behavior
the following eclipse help parameters work as ecpected:

- args.eclipse.provider

- args.eclipse.version

## Actual Behavior
they don't show up in plugin.xml at all. not even their default values

## Possible Solution
uncomment lines between
https://github.com/dita-ot/org.dita.eclipsehelp/blob/master/xsl/map2pluginImpl.xsl#L134
and
https://github.com/dita-ot/org.dita.eclipsehelp/blob/master/xsl/map2pluginImpl.xsl#L165

## Steps to Reproduce
run an eclipe help transformation and check plugin.xml