HBASE-22299 Documentation has incorrect default number of versions

[anis016]

Corrected the default value as 1. Also updated the deprecated HColumnDescriptor class and added ColumnFamilyDescriptorBuilder in the documentation.

Fixes: HBASE-22299

[Apache-HBase]

🎊 +1 overall

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+1	mvninstall	272	the patch passed
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0	refguide	469	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
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+1	asflicense	17	The patch does not generate ASF License warnings.
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Subsystem	Report/Notes
Docker	Client=17.05.0-ce Server=17.05.0-ce base: https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-187/1/artifact/out/Dockerfile
GITHUB PR	#187
Optional Tests	dupname asflicense refguide
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git revision	master / d3bf9c0
maven	version: Apache Maven 3.5.4 (1edded0938998edf8bf061f1ceb3cfdeccf443fe; 2018-06-17T18:33:14Z)
refguide	https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-187/1/artifact/out/branch-site/book.html
refguide	https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-187/1/artifact/out/patch-site/book.html
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[petersomogyi]

Thanks for the patch @anis016!