[NETBEANS-3508] Fixed compiler warnings concerning rawtypes ContextAw…

[mklaehn]

…areService

There are compiler warnings about rawtype usage with ContextAwareService like the following

   [repeat] .../ide/spi.debugger.ui/src/org/netbeans/spi/debugger/ui/BreakpointType.java:204: warning: [rawtypes] found raw type: ContextAwareService
   [repeat]         static ContextAwareService createService(Map attrs) throws ClassNotFoundException {
   [repeat]                ^
   [repeat]   missing type arguments for generic class ContextAwareService<T>
   [repeat]   where T is a type-variable:
   [repeat]     T extends Object declared in interface ContextAwareService

The aim is to change the code such that these warnings are no longer emitted by the compiler.