Add TimePeriodInSecBeforeTsidxReduction for Index

[IPrototypeI]

Adding new parameter for index creation.

Hello would it be possible to add following parameter TimePeriodInSecBeforeTsidxReduction as optional for index creation
You just have to extend

type IndexObject
TimePeriodInSecBeforeTsidxReduction int json:"timePeriodInSecBeforeTsidxReduction,omitempty" url:"timePeriodInSecBeforeTsidxReduction,omitempty"``

and getIndexConfig with

indexConfigObject.TimePeriodInSecBeforeTsidxReduction = d.Get("time_period_in_sec_before_tsidx_reduction").(int)

this would be the description
"time_period_in_sec_before_tsidx_reduction": { Type: schema.TypeInt, Optional: true, Computed: true, Description:The amount of time, in seconds, between service runs to reduce the tsidx files for any buckets that have reached the age specified by
'timePeriodInSecBeforeTsidxReduction', },

and for the error handling

if err = d.Set("time_period_in_sec_before_tsidx_reduction", entry.Content.TimePeriodInSecBeforeTsidxReduction); err != nil { return err }

[anushjay]

@IPrototypeI Would be a great addition. Do you mind creating a PR and adding the field to the existing test for indexes? I'm happy to review and merge the changes.

[IPrototypeI]

@anushjay awesome I will go ahead and create a pullrequest for each of the features :)