Updated and rectified the checks in logprob and the corresponding tests suites

Author: Dhruvanshu-Joshi

tests/logprob/test_checks.py

@@ -53,7 +53,7 @@
 currentdir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
 parentdir = os.path.dirname(currentdir)
 sys.path.insert(0, parentdir)
-from tests.distributions.test_multivariate import dirichlet_logpdf
+from distributions.test_multivariate import dirichlet_logpdf
 
 
 def test_specify_shape_logprob():