PostingsFormat Fix for odfe 1.9

[vamshin]

• postings list fix

Issue #, if available:
#227

Description of changes:
#236

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[vamshin]

Manually verified suggest Field to check PostingsFormat fix

curl -X PUT "localhost:9200/music?pretty" -H 'Content-Type: application/json' -d'

{
"settings": {
"index": {
"knn": true
}
},
"mappings": {
"properties": {
"suggest": {
"type": "completion"
}
}
}
}
'

curl -X POST "localhost:9200/music/_doc/1?refresh=true" -H 'Content-Type: application/json' -d'
{
"suggest" : {
"input": [ "Nevermind", "Nirvana" ],
"weight" : 34
}
}
'

curl -X POST "localhost:9200/music/_search?pretty" -H 'Content-Type: application/json' -d'
{
"suggest": {
"song-suggest": {
"prefix": "nir",
"completion": {
"field": "suggest"
}
}
}
}
'

Output:-

{
"took" : 92,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 0,
"relation" : "eq"
},
"max_score" : null,
"hits" : [ ]
},
"suggest" : {
"song-suggest" : [
{
"text" : "nir",
"offset" : 0,
"length" : 3,
"options" : [
{
"text" : "Nirvana",
"_index" : "music",
"_type" : "_doc",
"_id" : "1",
"_score" : 34.0,
"_source" : {
"suggest" : {
"input" : [
"Nevermind",
"Nirvana"
],
"weight" : 34
}
}
}
]
}
]
}
}