file system watchers in vscode-java

[yyoncho]

At this point vscode-java register the following watches:

workspace.createFileSystemWatcher('/*.java'),
workspace.createFileSystemWatcher('/pom.xml'),
workspace.createFileSystemWatcher('/*.gradle'),
workspace.createFileSystemWatcher('/.project'),
workspace.createFileSystemWatcher('/.classpath'),
workspace.createFileSystemWatcher('/settings/*.prefs'),
workspace.createFileSystemWatcher('/src/')

It seems to me that these watchers must be established by as a result of "workspace/didChangeWatchedFiles". Please correct me if I mistaken.

[fbricon]

if you mean dynamically register those watchers after importing the projects, then yes, that would make sense

[fbricon]

Fixed with #981