[Measures] added new measure (UsageCounts) #214

This PR introduces a new oozie workflow for the creation of a new action set that includes the usage counts (views and downloads) as a new measure on the result level.

It will have as provenaceaction.classid the value measure:usage_counts and as id for the measure the keywords downloads and views referring respectively to the attribute with the same names in the usage stats table, while the key for the unit will be count.

The values are calculated as the sum of the counts, aggregated for each record id.

The remaining part of the measure element is set exactly as for the bip!Finder integration.

This PR introduces a new oozie workflow for the creation of a new action set that includes the usage counts (views and downloads) as a new measure on the result level. It will have as **provenaceaction.classid** the value **measure:usage_counts** and as id for the measure the keywords **downloads** and **views** referring respectively to the attribute with the same names in the usage stats table, while the **key** for the unit will be **count**. The values are calculated as the sum of the counts, aggregated for each record id. The remaining part of the measure element is set exactly as for the **bip!Finder** integration.

Overall looks ok, just minor changes. Please check the inline comments and remember to compile before issuing the commit&push so that the common formatting is applied.

 @ -392,2 +392,4 @@
 		return null;
 	}
 	public static KeyValue newKeyValueInstance (String key, String value, DataInfo dataInfo){

 @ -0,0 +65,4 @@
 		SparkConf conf = new SparkConf();
 		conf.set("hive.metastore.uris", parser.get("hive_metastore_uris"));
 		final String dbname = parser.get("statsdb");

 @ -0,0 +19,4 @@
   },
   {
     "paramName": "sdb",
     "paramLongName": "statsdb",

 @ -0,0 +5,4 @@
             <description>the path where to store the actionset</description>
         </property>
         <property>
             <name>statsdb</name>

 @ -0,0 +6,4 @@
         </property>
         <property>
             <name>statsdb</name>
             <description>the path where to store the actionset</description>

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[Measures] added new measure (UsageCounts) #214

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 @ -0,0 +33,4 @@
 /**
  * created the Atomic Action for each tipe of results