Too many possibilities for autocompletion with proactive-client

[lpellegr]

Automatic completion from proactive-client when no text has been typed proposes to display 71125 possibilities.

Steps to reproduce the bug are the following:

1. Run proactive-client
2. Press tab

The output is the following:

$ ./bin/proactive-client 
Type help() for interactive help 

> Display all 71125 possibilities? (y or n)

[youribonnaffe]

Might be related to path completions.

> schedul
schedulerhelp()    schedulerstats()   scheduling.iml     scheduler

[mebubo]

@youribonnaffe Or classes on the classpath, perhaps