Replace NormalisedSuperSummaries with hybrid

- Add service level fields to NormalisedSuperSummaries and rename to
  HybridSuperSummaries to show that it is now a hybrid of normalised
  summaries and plain summaries.
- Change both super summary views to point at HybridSuperSummaries. These
  views either exclude the normalised duration fields or the service type
  fields.
- Change procedures to match above changes.
Revert history views to use service level fields

- Change history views to use HybridSuperSummaries and revert them to
  using the actual service level (rather than a back calculation).
Add missing semi-colon from server schema
Correct a column name and parent tables in views

- Correct column name in VSuperSummaries as it now points to the hybrid
  super summary table which uses "Infrastructure" without "Type" as per
  the new normalised record type.
- Change CPU views to point to the hybrid super summary table.
Update comments and a procedure name for hybrid

- Update references to NormalisedSuperSummaries to HybridSuperSummaries.
- Change name of CopySummaries procedure called in Python to match change
  of name in schema to CopyNormalisedSummaries.
Exclude norm summary sites from history views

- Add WHERE ServiceLevelType <> '' to history views to exclude records
  from sites that send normalised summaries as service level fields will
  be set to default values (empty string and zero) so these shouldn't
  appear in the history views.
Add NOT NULL to primary key hybrid summary fields

- As these fields are part of the primary key, they have an implicit NOT
  NULL condition so might as well make it clear.
Alias aggregated columns in normalised view

- Alias aggregated columns in the normalised super summary view to their
  unaggregated name so that they match the format of the normalised
  record type.
Add normalised views to unloader.cfg list