Create an HttpReportProcessor

Create an http report processor to send reports to a url via http POST. It would be great to also have a screen where one configures the parameters like connection url, and others, needed to run this processor, just like we do for the EmailReportProcessor.
An immediate use case for this is where UgandaEMR exports a metadata template from DHIS2 and configures a text report renderer which fills this JSON template with data and then makes an HTTP Post to a url to import this data into DHIS2.

Examples of other report processors can be found at: https://github.com/openmrs/openmrs-module-reporting/tree/master/api/src/main/java/org/openmrs/module/reporting/report/processor

https://wiki.openmrs.org/display/docs/Report+Processors