Task #8887: getResourceUsages now gathers reource usages per resource per status. Made interactive charts for resource usage in web scheduler

Task #8887: performance increase by substiting many small selects with one bigger select and filtering in python. Current bottleneck is the many individual claim inserts.

Task #8887: initial naive implementation with possible O(N^2) behaviour: do conflict/prescheduled status validatation for updated and freed resource claims

Task #8887: added validateResourceClaimsStatus method to check conflicting resource claims and updating the claim and tasks status to conflict

Task #8887: removed obsolete getResourceClaimsForTask methods. Use getResourceClaims with task_id as argument

Task #8887: modified getResourceClaims so we can query for time-window, status, resource_type or task_id