Build: updating eclipse target to 3.7.1 since 3.7 does not have java7 support

Signed-off-by: Kunal Shroff <shroffk@bnl.gov>
Merge branch '3.2.x' of github.com:ControlSystemStudio/cs-studio into 3.2.x

* '3.2.x' of github.com:ControlSystemStudio/cs-studio:
  o.s.u.pvmanager.pva: fixed wrong PVADataSource path, added pva to the NSLS2 product plugin list
  o.c.u.pvmanager.pva: cleanup
  c.p.org.epics.pvaccess: added
  c.p.org.epics.pvdata cleanup
  c.p.org.epics.pvdata cleanup
  BOY: check if PV is writable on every value update because PV Manager doesn't give PVWriter.pvChanged() notification if the PV is initially read only.
  Core: adding missing dependencies Signed-off-by: Kunal Shroff <shroffk@bnl.gov>
  nsls2: adding singlesource to plugin.list