Configurable locks

Replace hardcoded use of locks in cLockedDefaultList and others with a generic lock class so that the actual locking implementation can be choose at compile or runtime.

List of locked classes:

• cLockedDefaultList
• cLockedMsgHeap
• cSpinLockedMsgHeap

List of Lock types

• SpinLock
• NoLock
• SuspendLock

Possible implementation: template classes

• template cDefaultList