- needed for unification of alignment producers
 - in addition:
   - `EventSetup` was nowhere used
   - in case of zero processed events it would be undefined

…e class.

…alyzer`.

…neric `AlignmentProducerAsAnalyzer_cff`.

…nt producer.

 - add test mode to redirect it to a dummy path
   -> avoids eos command which depends on network connection

…l changes.

 - compiles and is technically working
 - need to check the correctness of the output
 - need to optimize usage regarding fixed sizes

 - compiles and is technically working
 - need to check the correctness of the output

 - exit with meaningful error message in case of failure
 - previously some failures where silently ignored leading to
   confusing failures later

Added also a full module-level alignment example.

$CMSSW_BASE/src/Alignment/ReferenceTrajectories/src/GblTrajectory.cc:1045:36: warning: moving a temporary object prevents copy elision [-Wpessimizing-move]
        innerTransDer.emplace_back(std::move(
                                   ^
$CMSSW_BASE/src/Alignment/ReferenceTrajectories/src/GblTrajectory.cc:1045:36: note: remove std::move call here
        innerTransDer.emplace_back(std::move(
                                   ^~~~~~~~~~

The try-catch clause is redundant here because the only exception
which could be thrown is if the memory allocation for the FileBlob
content does not succeed, i.e. we are out of RAM.
If this happens, the job should quit anyways, I think.

Every other failure is covered by the check for the FileBlob size.