Fixing bugs in proxy plugins (multiple proxies)
Fixing bugs in proxy plugins (multiple proxies)

- ProxyUserRR now only returns #ofproxies=#ofusers
- ProxyUserMapWRecycling had multiple issues:
  - Fixed issue where it would just crash
  - Now adds proxies in loop correctly
  - Changed allocation of proxies to take into
    account the number of user jobs for each user.

Still pending: need to test with multiple trust domains/credential types
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holzman/glideinwms-old,holzman/glideinwms-old,holzman/glideinwms-old