Issue with cohort download in version 2.1 and above, and concept download in version 2.0.x and above

There are bugs that are affecting the download of cohorts and numeric concepts for OpenMRS versions 2.1 and above.

For cohort download, the module throws an exception if both search parameter(q) and sync date are provided. 

For Concepts download, there was a field deprecation that only affects numeric concepts i.e getPrecise function was marked as deprecated in version 1.11.x (https://github.com/openmrs/openmrs-core/blob/1.11.x/api/src/main/java/org/openmrs/ConceptNumeric.java#L236) and removed in version 2.0.x (https://github.com/openmrs/openmrs-core/blob/2.0.x/api/src/main/java/org/openmrs/ConceptNumeric.java)