[DOCS] marked pipeline aggregator documentation as Experimental

docs/reference/aggregations/pipeline/avg-bucket-aggregation.asciidoc

@@ -1,6 +1,10 @@
 [[search-aggregations-pipeline-avg-bucket-aggregation]]
 === Avg Bucket Aggregation
 
+coming[2.0.0]
+
+experimental[]
+
 A sibling pipeline aggregation which calculates the (mean) average value of a specified metric in a sibling aggregation. 
 The specified metric must be numeric and the sibling aggregation must be a multi-bucket aggregation.
 

docs/reference/aggregations/pipeline/bucket-script-aggregation.asciidoc

@@ -1,6 +1,10 @@
 [[search-aggregations-pipeline-bucket-script-aggregation]]
 === Bucket Script Aggregation
 
+coming[2.0.0]
+
+experimental[]
+
 A parent pipeline aggregation which executes a script which can perform per bucket computations on specified metrics 
 in the parent multi-bucket aggregation. The specified metric must be numeric and the script must return a numeric value.
 

docs/reference/aggregations/pipeline/cumulative-sum-aggregation.asciidoc

@@ -1,6 +1,10 @@
 [[search-aggregations-pipeline-cumulative-sum-aggregation]]
 === Cumulative Sum Aggregation
 
+coming[2.0.0]
+
+experimental[]
+
 A parent pipeline aggregation which calculates the cumulative sum of a specified metric in a parent histogram (or date_histogram) 
 aggregation. The specified metric must be numeric and the enclosing histogram must have `min_doc_count` set to `0` (default
 for `histogram` aggregations).

docs/reference/aggregations/pipeline/derivative-aggregation.asciidoc

@@ -1,6 +1,10 @@
 [[search-aggregations-pipeline-derivative-aggregation]]
 === Derivative Aggregation
 
+coming[2.0.0]
+
+experimental[]
+
 A parent pipeline aggregation which calculates the derivative of a specified metric in a parent histogram (or date_histogram) 
 aggregation. The specified metric must be numeric and the enclosing histogram must have `min_doc_count` set to `0` (default
 for `histogram` aggregations).

docs/reference/aggregations/pipeline/max-bucket-aggregation.asciidoc

@@ -1,6 +1,10 @@
 [[search-aggregations-pipeline-max-bucket-aggregation]]
 === Max Bucket Aggregation
 
+coming[2.0.0]
+
+experimental[]
+
 A sibling pipeline aggregation which identifies the bucket(s) with the maximum value of a specified metric in a sibling aggregation
 and outputs both the value and the key(s) of the bucket(s). The specified metric must be numeric and the sibling aggregation must 
 be a multi-bucket aggregation.

docs/reference/aggregations/pipeline/min-bucket-aggregation.asciidoc

@@ -1,6 +1,10 @@
 [[search-aggregations-pipeline-min-bucket-aggregation]]
 === Min Bucket Aggregation
 
+coming[2.0.0]
+
+experimental[]
+
 A sibling pipeline aggregation which identifies the bucket(s) with the minimum value of a specified metric in a sibling aggregation 
 and outputs both the value and the key(s) of the bucket(s). The specified metric must be numeric and the sibling aggregation must 
 be a multi-bucket aggregation.

docs/reference/aggregations/pipeline/movavg-aggregation.asciidoc

@@ -1,6 +1,10 @@
 [[search-aggregations-pipeline-movavg-aggregation]]
 === Moving Average Aggregation
 
+coming[2.0.0]
+
+experimental[]
+
 Given an ordered series of data, the Moving Average aggregation will slide a window across the data and emit the average
 value of that window.  For example, given the data `[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]`, we can calculate a simple moving
 average with windows size of `5` as follows:

docs/reference/aggregations/pipeline/sum-bucket-aggregation.asciidoc

@@ -1,6 +1,10 @@
 [[search-aggregations-pipeline-sum-bucket-aggregation]]
 === Sum Bucket Aggregation
 
+coming[2.0.0]
+
+experimental[]
+
 A sibling pipeline aggregation which calculates the sum across all bucket of a specified metric in a sibling aggregation. 
 The specified metric must be numeric and the sibling aggregation must be a multi-bucket aggregation.