[formatter] Set org.eclipse.jdt.core.formatter.join_wrapped_lines=false by default

[fbricon]

Neither Intellij nor Netbeans join wrapped lined by default. It can only be seen in Eclipse (and jdt.ls) by default, which is fairly annoying most of the time.
Given org.eclipse.jdt.core.formatter.join_wrapped_lines came up in several issues, I think we should set org.eclipse.jdt.core.formatter.join_wrapped_lines=false by default

[rgrunber]

@fbricon , I also noticed org.eclipse.jdt.core.formatter.join_lines_in_comments is also true by default. Should we include that also ?

[fbricon]

@fbricon , I also noticed org.eclipse.jdt.core.formatter.join_lines_in_comments is also true by default. Should we include that also ?

yeah good point