USMNdArray returns float64 array by default

Author: khaled

numba_dpex/tests/core/types/USMNdAArray/__init__.py renamed to numba_dpex/tests/core/types/USMNdArray/__init__.py

@@ -6,7 +6,7 @@
 
 def test_init():
     usma = USMNdArray(1, device=None, queue=None)
-    assert usma.dtype.name == "int64"
+    assert usma.dtype.name == "float64"
     assert usma.ndim == 1
     assert usma.layout == "C"
     assert usma.addrspace == 1
@@ -19,7 +19,7 @@ def test_init():
     device = dpctl.SyclDevice().filter_string
 
     usma = USMNdArray(1, device=device, queue=None)
-    assert usma.dtype.name == "int64"
+    assert usma.dtype.name == "float64"
     assert usma.ndim == 1
     assert usma.layout == "C"
     assert usma.addrspace == 1
@@ -39,7 +39,7 @@ def test_init():
 
     queue = dpctl.SyclQueue()
     usma = USMNdArray(1, device=None, queue=queue)
-    assert usma.dtype.name == "int64"
+    assert usma.dtype.name == "float64"
     assert usma.ndim == 1
     assert usma.layout == "C"
     assert usma.addrspace == 1