[Master] Add Internal Token Revocation implementation for token persistence removal feature #12174
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Purpose
This PR adds the implementation for the indirect token revocations due to internal events. The internal events are of two types.
With the token persistence removal feature [3], such revocations has to be handled in the form of attribute(rule) base validation, since the tokens are not available in the db. Therefore the attributes to be considered for the revocation is propagated to CP from the KM then to the GW cache.
[1] - wso2/api-manager#1678
[2] - wso2/api-manager#2159
[3] - wso2/api-manager#1664