Make eddy tests runnable in non-SGE environments

Adjusts the eddy tests so they can be run in regular non-cluster environments. Adjustments to evaluation scrips to avoid nibabel deprecation warnings.

Also an unrelated fix to one of the bet unit tests.

EddyHigh_b_Test/EddyHigh_b_Feeds.py

@@ -31,10 +31,10 @@ class EddyHigh_b_FeedsType(object):
 
         # Compare images and create statistics of differences
         try:
-            mask = self._mask.get_data().astype(float)
+            mask = self._mask.get_fdata()
             mask = (mask > 0).astype(float)
-            corrdiff = self._corr.get_data().astype(float)
-            corrdiff = abs(corrdiff - self._precomp_corr.get_data().astype(float))
+            corrdiff = self._corr.get_fdata()
+            corrdiff = abs(corrdiff - self._precomp_corr.get_fdata())
 
             self._corrdiffmeans = np.zeros(corrdiff.shape[3])
             for vol in range(0, corrdiff.shape[3]):
@@ -131,4 +131,4 @@ def main(argv):
 
 
 if __name__ == "__main__":
-    main(sys.argv)
+    main(sys.argv)
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