Sync patches r14454, r14455, r14456, r14457, r14458, and r14462 from main trunk.
1. MdeModulePkg: Variable drivers robustly handle crashes during Reclaim().
2. SecurityPkg: Variable drivers robustly handle crashes during Reclaim().
3. Nt32Pkg: Use FaultTolerantWritePei driver.
4. EmulatorPkg: Use FaultTolerantWritePei driver.
5. OvmfPkg EmuVariableFvbRuntimeDxe: Let FaultTolerantWriteDxe to init working block header.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: svn://svn.code.sf.net/p/edk2/code/branches/UDK2010.SR1/MdeModulePkg@15341 6f19259b-4bc3-4df7-8a09-765794883524
Sync patches r15136 and r15137 from main trunk.
1. DxeCore is designed to trust input data, so add comments to reminder caller to do check to follow PI specification when necessary.
   Since LBA_CACHE is DxeCore implementation specific, DxeCore will check it here.
2. CapsulePei coalesce need add more sanity check for each Capsule Fragment.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: svn://svn.code.sf.net/p/edk2/code/branches/UDK2010.SR1/MdeModulePkg@15342 6f19259b-4bc3-4df7-8a09-765794883524
Sync patches r15330, r15331 and r15336 from main trunk.
1. Remove ASSERT check for SetVariable in FirmwarePerformanceDataTableDxe.
2. Add comments to describe PlatformDriOverrideDxe is used for test purpose.
3. Remove ASSERT when SetVariable for ConOutDev/ConInDev/ErrOutDev variables failed.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: svn://svn.code.sf.net/p/edk2/code/branches/UDK2010.SR1/MdeModulePkg@15346 6f19259b-4bc3-4df7-8a09-765794883524
Sync patch r15340 from main trunk.
MdeModulePkg/SecurityPkg Variable: Return error status to avoid inconsistency between PlatformLang and Lang.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: svn://svn.code.sf.net/p/edk2/code/branches/UDK2010.SR1/MdeModulePkg@15349 6f19259b-4bc3-4df7-8a09-765794883524