$all not available for rolling up named hierarchies

1. Introduce a further grouping operator rollupall that combines rollup / $all and replaces $all : Rollup an unnamed leveled hierarchy incl. root level GET Sales?$apply=groupby(rollupall(Product/Name,Product/Category/Name), T) Rollup an named leveled hierarchy incl. root level GET Sales?$apply=groupby(rollupall(Product/ProductHierarchy), T) Rollup a named recursive hierarchy incl. root nodes // not needed. For details see this comment: - https://issues.oasis-open.org/browse/ODATA-1377?focusedCommentId=79188&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-79188- GET SalesOrganizations?$apply=groupby(rollupall(SalesOrgHierarchy), T) 2. Update handling for leveled hierarchies. In  3.10.2  Grouping with rollup and $all : Replace the mentions of $all with rollupall Replace processing rule for groupby((rollup($all, )), ) with: groupby((rollupall(p1)),, ) is equivalent to concat(groupby(( ), ), ) 3.   // not needed. For details see this comment: https://issues.oasis-open.org/browse/ODATA-1377?focusedCommentId=79188&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-79188 Update handling for recursive hierarchies.  ODATA-1218 specifies groupby(rollup(...),...) for recursive hierarchies. In the proposed extension , add these processing rules for the given input set: The result of groupby((rollupall(RHQ),R),T) is defined as {{ concat (groupby((R),T),groupby((rollup(RHQ), R), T))}} The result of groupby((rollupall(RHQ)),T) is defined as {{ concat (T,groupby((rollup(RHQ)), T))}} 4. Services announce support for rollup via annotation of term ApplySupported with property Rollup of type RollupType . Proposal is to keep this and treat rollup / rollupall as a single capability and to express this in the documentation of the RollupType enumeration: SingleHierarchy - Only one rollup or rollupall operator per groupby MultipleHierarchies - Full support for rollup and rollupall