Gaffer v1.21 released

[n3101]

Gaffer v1.21 has been released. The following changes have been made:

1. The long-abandoned Create CSV Element Generator Functions #1867 has finally been merged, adding the following functions:

DateToTimeBucketEnd

DateToTimeBucketStart

ToTimeBucket

ToTimeBucketEnd

ToTimeBucketStart

ElementTupleDefinition

PropertiesFilter

PropertiesTransformer

TuplesToElements

TupleToElements

IterableToHyperLogLogPlus

ToHyperLogLogPlus

HyperLogLogPlusEntityGenerator

IterableToHllSketch

ToHllSketch

HllSketchEntityGenerator

SketchesJsonModules

StringsToTypeSubTypeValue

StringsToTypeValue

Regrettably these remain undocumented for now. If any of these sound useful, then please ask and we will try to provide some information.

2. We have deprecated a number of items that will not appear in the forthcoming Gaffer 2.0 major release:

gchq/gaffer-tools#947
deprecates the unused schema builder UI in its entirety. If we pursue this idea in future we will just start again.
gchq/gaffer-tools#951
Deprecates the gafferpy python API in its entirety. In Gaffer 2.0 the alternative “fishbowl” dynamic API will be worked into a finished product.
gchq/koryphe#220
deprecates Closeable. This functionality will be moved into Gaffer where it will replace an alternative implementation!

3. Update ParseDate to work with input timestamps in microseconds koryphe#149
   Adds a flag to the ParseDate function to handle input in microseconds.

4. Add Python examples for new functions gaffer-doc#236
   Adds Python examples to the new operations documentation added in Add examples for new functions gaffer-doc#233

5. Replace MockAccumuloStore usage gaffer-doc#209
   Removes the previously deprecated MockAccumuloStore from Doc examples. Gaffer 2.0 will continue to support Accumulo 1 but add support for Accumulo 2.

6. A number of other maintenance changes were implemented in this release, principally to prepare for development of Gaffer 2.0.