Java8-11 changes consistent with 17

[leerho]

This PR is targeting a DS-Java 6.1.0 release. The changes in this PR make the Java repo consistent with the just released Memory 3.0.0. This ds-java release is still targeted for Java 8 and 11 and will likely be the last release supporting Java 8 and 11. If all goes as planned, the next release will be DS-Java 7.0.0, which will be targeted at Java 17.

All of the following changes are internal and do not impact the DS-Java API.

DS-Java changes from Master to branch _java8-11_changes_consistent_with17:

common/Util.java

• 1 javadoc

theta/Sketch

• Deprecation removed on getMaxCompactSketchBytes
• bug fix: getCompactSketchMaxBytes(lgK)

theta/Sketches

• Deprecation removed on getMaxCompactSketchBytes(numEntries), Javadoc improved.

filters/bloomfilter

• all new code for 6.1.0.
• changes are to make the calls to Memory compatible with Memory 3.0.0.

hll/DirectAuxHashMapTest

• WritableHandle removed

hll/DirectCouponListTest

• WritableHandle removed

kll/KllDoublesValidationTest

• code comment change

quantiles/DebugUnionTest

• WritableHandle removed

quantiles/DirectQuantilesMemoryRequestTest

• WritableHandle removed

quantiles/DoublesSketchTest

• WritableHandle removed

quantiles/PreambleUtilTest

• WritableHandle removed

theta/CompactSketchTest

• WritableHandle removed

theta/DirectQuickSelectSketchTest

• WritableHandle removed

theta/HeapifyWrapSerVer1and2Test

• All variable renaming

theta/SketchesTest

• bug fix: getCompactSketchMaxBytes

theta/UnionImplTest

• WritableHandle removed

theta/UpdateSketchTest

• removed some code comments

pom.xml

• updated Memory dependency to 3.0.0
• Removed some comments
• Reorganized the section
• updated some of the plugin versions

Readme

• Fixed the badges
• Removed references to "-P strict"

[leerho]

This must wait until DS-Memory 3.0.0 is released.

[leerho]

Thank you for your comments!
In the process of investigating the first comment (theta/UnionImplTest). I uncovered some other issues that need to be fixed, but I will submit those under different PRs ... and try to make them as small as possible :)