Added support for float/double types

Added support for float/double types
- bug#25677: ResourceUsage->quantity is now double
- PBSResourceUsage->quantity also changed to double, please check
Important remark: logevent.c requires different names for all parameters, especially those that have a different type (it does not matter that all reasons are strings, but it matters = fails if you have for example one quantity double and one quantity int -> the solution is either to rename or to have the smae type).