Implement consistent conversion/lookup functions to translate
between names and IDs for all resource types.

Also reorganize all internal resource ID functions into a separate
source file for better organization.

Clean up documentation and references.

Use the entire resource ID space (16 bits) and do not
immediately recycle ID values until the full space is
used.

Implement a generic routine to find the next available ID,
and modify every resource ID allocation to use this
routine.

Where necessary, this also corrects for differences in
argument checking and duplicate checking between the various
resource types.  All resource allocation procedures now
have consistent argument checking, and will reject
duplicate name creation for any resources that are
also associated with names.

There is no need to store the main task name a second time in
the app record, as it is already stored in the task record.

Add a NULL check to CFE_ES_ResourceID_ToIndex_Internal().  Although
this function is internal, it does check arguments on behalf of the
public APIs which call this.

For backward compatibility - remove logic that actually made thes
different numerical values.  This should be put back in at some point.

Fix #943, #924 and #502, improve resource ID management

Due to a merge the setting of this to its final value got moved.
Need to use "Pending" value, not the one in the table record.