Changed tests to reflect interface update in last commit.

tests/testthat/testHaldDP.R

@@ -89,7 +89,7 @@ test_that("HaldDP model construction", {
         source = 'Source')
   k = Prev(k, prev = 'Value', source = 'Source')
 
-  model <- HaldDP$new(
+  model <- HaldDP(
     y = y,
     x = x,
     k = k,

tests/testthat/testHaldDPTimeLoc.R

@@ -32,7 +32,7 @@ test_that("Test time/location data structures", {
   y = Y(data=ss, y = 'Human', type='Type', time = 'Time', location = 'Location')
   x = X(data=src, x='Count', type='Type', time='Time', source='Source')
   k = Prev(sim_SA_prev, prev='Value', time='Time', source='Source')
-  model = HaldDP$new(
+  model = HaldDP(
     y = y,
     x = x,
     k = k,