Implement HPEXPIRE, HPEXPIREAT, HPEXPIRETIME, HTTL and HPTTL

[tishun]

As part of #2834

Implement HPEXPIRE, HPEXPIREAT, HPEXPIRETIME, HTTL and HPTTL

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[mp911de]

Nit: Comments of HPERSIST contain {@List} of {@Long} instead of {@link List} of {@code long}.

[atakavci]

looks good!

[tishun]

Nit: Comments of HPERSIST contain {@List} of {@Long} instead of {@link List} of {@code long}.

Good catch, was meaning to change that, will address it along the other things we talked about