update version to 2.8.2.7

[HOPS-891] prevent NullPointers in FSNamesystem.getAdditionalDatanode

[HOPS-891] prevent NullPointers in FSNamesystem.getAdditionalDatanode

update version to 2.8.2.6

[HOPS-828] HADOOP-14597. Native compilation broken with OpenSSL-1.1.0…

…. Contributed by Ravi Prakash.

update to version 2.8.2.5

[HOPS-636] fix INodeLock for multiple paths

update version number to 2.8.2.4

[HOPS-396] Fix where max GPU allocation is set to 0

release 2.8.2.3