TblHandle used before validation in CFE_TBL_Load

[skliper]

Describe the bug
TblHandle used before validation

To Reproduce
See code snip, invalid handle could cause fault

Expected behavior
Validate handle before using

Code snips

cFE/fsw/cfe-core/src/tbl/cfe_tbl_api.c

Lines 681 to 687 in 8365a0c

	CFE_TBL_AccessDescriptor_t *AccessDescPtr = &CFE_TBL_TaskData.Handles[TblHandle];
	CFE_TBL_RegistryRec_t *RegRecPtr = &CFE_TBL_TaskData.Registry[AccessDescPtr->RegIndex];
	char AppName[OS_MAX_API_NAME]={"UNKNOWN"};
	bool FirstTime = false;
	/* Verify access rights and get a valid Application ID for calling App */
	Status = CFE_TBL_ValidateAccess(TblHandle, &ThisAppId);

System observed on:
In code

Additional context
None

Reporter Info
Jacob Hageman - NASA/GSFC

[skliper]

Ping @dmills3

[jphickey]

deleted my previous comment - I see it now ... yes this is a bug.

[jphickey]

This code was last modified by @CDKnightNASA in #606 so probably should get his take on best fix.