Primera pure patches & various small fixes

[rg9975]

Description

This PR...
This PR fixes several small issues with Fiberchannel implementation and locally discovered issues:

1. volume disconnect timing issues
2. rescan cleanup script not working correctly
3. template copy issues
4. masked/hidden errors and exceptions

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• build/CI
• test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

Tested locally with real world workloads

How did you try to break this feature and the system with this change?

Tested locally with real world workloads

[codecov]

Codecov Report

Attention: Patch coverage is 5.20833% with 91 lines in your changes missing coverage. Please review.

Project coverage is 15.12%. Comparing base (ed1b145) to head (3449689).

Files with missing lines	Patch %	Lines
...rage/datastore/adapter/primera/PrimeraAdapter.java	0.00%	23 Missing ⚠️
...pervisor/kvm/storage/MultipathSCSIAdapterBase.java	0.00%	15 Missing ⚠️
...ud/hypervisor/kvm/storage/KVMStorageProcessor.java	0.00%	11 Missing ⚠️
...torage/motion/StorageSystemDataMotionStrategy.java	0.00%	9 Missing ⚠️
.../spring/lifecycle/CloudStackExtendedLifeCycle.java	0.00%	7 Missing ⚠️
...k/spring/lifecycle/registry/RegistryLifecycle.java	0.00%	6 Missing ⚠️
...c/main/java/com/cloud/user/AccountManagerImpl.java	0.00%	5 Missing ⚠️
.../subsystem/api/storage/PrimaryDataStoreDriver.java	0.00%	3 Missing ⚠️
...e/cloudstack/storage/volume/VolumeServiceImpl.java	0.00%	3 Missing ⚠️
...er/LibvirtGetUnmanagedInstancesCommandWrapper.java	0.00%	2 Missing ⚠️
... and 4 more

Additional details and impacted files

@@             Coverage Diff              @@
##               4.19   #10132      +/-   ##
============================================
- Coverage     15.13%   15.12%   -0.01%     
- Complexity    11265    11268       +3     
============================================
  Files          5408     5408              
  Lines        473900   473973      +73     
  Branches      57791    57809      +18     
============================================
+ Hits          71705    71710       +5     
- Misses       394192   394256      +64     
- Partials       8003     8007       +4     

Flag	Coverage Δ
uitests	4.30% <ø> (ø)
unittests	15.85% <5.20%> (-0.01%)	⬇️

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