Added alarm pulsing option to PVWidgetEditpart.

Current implementation defaults to false, and if option is selected will
pulse any alarm sensitive part of the widget every 1.5s for major,
and every 3s for minor
Hide Pulsing Alarm field if we have a native action button in the same way as we hide background color alarm sensitive
Don't constantly recalculate the border when in alarm pulsing mode as it will never change
Added eclipse preferences to allow MINOR and MAJOR pulsing alarm periods to be set by user.
Get the framerate for the screen update from OPI_GUI_REFRESH_CYCLE
remove all reexports
fix imports after removing re-exports
products/SNS: Remove, now in cs-studio-SNS repo
Merge pull request #724 from ControlSystemStudio/cleanup566_sns

products/SNS: Remove, now in cs-studio-SNS repo
fix imports from removing reexports
merge
products/FRIB /COMMON/ CORE/: remove, common now in repo org.csstudio.product
Merge pull request #725 from ControlSystemStudio/cleanup566_frib_core_commmon

products/FRIB /COMMON/ CORE/: remove, common in repo org.csstudio.product
fix imports from removing reexports
revert target file
o.c.utility.pvmanager.widgets.test: removing, because it's not a test
opibuilder: Add preference java_script_engine=RHINO or JDK

Default to the engine in opibuilder/lib/rhino/js.jar, but allow testing
the JDK's Rhino or Nashorn.
See https://github.com/ControlSystemStudio/cs-studio/issues/723
o.c.swt.xygraph: Release elements on CircularBuffer.clear()

Arrays.fill() requires Java 7.
Fixes #727
o.c.alarm.beast.server.test: Update to function with current server
o.c.vtype.pv: Add PV support (Scalars, based on V4 version 4.3 API)
o.c.pvmanager.widgets: ServiceButton logs error

.. which was previously just ignored, making it hard to debug errors in
JDBC service calls.