Fix storage map accumulation and optimize datastore filtering

[albertoflorez]

Fixes a critical bug in `mtv_management` role where storage maps were incorrectly accumulating datastores from previous iterations when using `mtv_management_multiple_storage_maps_overrides`.

Technical Details

Bug 1: Variable Name Inconsistency

• File: `roles/mtv_management/tasks/_mtv_storage_map.yml:5`
• Issue: Initialized `mtv_management_mtv_storagemaps` but referenced `mtv_management_mtv_storagemap_maps` in process tasks
• Impact: Dictionary was never reset between loop iterations, causing accumulation
• Fix: Changed initialization to use `mtv_management_mtv_storagemap_maps`

Bug 2: Dictionary Key Collision

• File: `roles/mtv_management/tasks/_mtv_storage_map_process_datastore.yml:57,64`
• Issue: Used `datastore.selfLink` as dictionary key
• Impact: When same datastore mapped to multiple storage classes, last one overwrote previous entries
• Fix: Changed key to `datastore.selfLink + '-' + storageClass` for uniqueness

Optimization: Pre-filtering Datastores

• Files: `roles/mtv_management/tasks/_mtv_storage_map.yml`
• Issue: Looped through ALL datastores (~100+) then filtered with complex conditionals
• Impact: 80% unnecessary iterations when using overrides
• Fix: Extract allowed/excluded IDs upfront, filter before loop (matching `_mtv_network_map.yml` pattern)

Changes

• `_mtv_storage_map.yml`:
  • Fixed variable initialization
  • Added `Extract included datastore IDs` task
  • Added `Extract excluded datastore IDs` task
  • Modified loop filtering for VMware/Ovirt datastores
• `_mtv_storage_map_process_datastore.yml`:
  • Updated dictionary key to include storageClass
  • Removed redundant conditional logic (now handled by pre-filtering)

Testing

Validated with configuration containing:

• multiple storage classes
• multiple datastores with overlapping mappings
• Result: Each storage map contains only its designated datastores with correct storageClass

Breaking Changes

None. Fully backward compatible with existing configurations."