modify unit test data folder name by Bo's request

tests/test_SpecDisperse.py

 #
-#need add environment parameter  TEST_HOME, link to "testData/"
+#need add environment parameter  UNIT_TEST_DATA_ROOT, link to "testData/"
 #linx and mac can run as follow, need modify the name of file directory
-#export TEST_HOME=/Users/zhangxin/Work/SlitlessSim/CSST_SIM/CSST_develop/csst-simulation/tests/testData
+#export UNIT_TEST_DATA_ROOT=/Users/zhangxin/Work/SlitlessSim/CSST_SIM/CSST_develop/csst-simulation/tests/testData
 #
 import unittest
 from ObservationSim.MockObject.SpecDisperser import rotate90, SpecDisperser
@@ -145,9 +145,9 @@ class TestSpecDisperse(unittest.TestCase):
     def __init__(self, methodName='runTest'):
         super(TestSpecDisperse,self).__init__(methodName)
 
-        self.conff= os.path.join(os.getenv('TEST_HOME'), 'CSST_GI2.conf')
-        self.throughputf= os.path.join(os.getenv('TEST_HOME'), 'GI.Throughput.1st.fits')
-        self.testDir = os.getenv('TEST_HOME')
+        self.conff= os.path.join(os.getenv('UNIT_TEST_DATA_ROOT'), 'CSST_GI2.conf')
+        self.throughputf= os.path.join(os.getenv('UNIT_TEST_DATA_ROOT'), 'GI.Throughput.1st.fits')
+        self.testDir = os.getenv('UNIT_TEST_DATA_ROOT')
 
         # self.conff = conff
         # self.throughputf = throughputf
@@ -697,8 +697,8 @@ class TestSpecDisperse(unittest.TestCase):
 
 if __name__ == '__main__':
 
-    os.environ['TEST_HOME']="/Users/zhangxin/Work/SlitlessSim/CSST_SIM/CSST_develop/csst-simulation/tests/testData"
-    testDir = os.getenv('TEST_HOME')
+    os.environ['UNIT_TEST_DATA_ROOT']="/Users/zhangxin/Work/SlitlessSim/CSST_SIM/CSST_develop/csst-simulation/tests/testData"
+    testDir = os.getenv('UNIT_TEST_DATA_ROOT')
     # conff= os.path.join(testDir, 'CSST_GI2.conf')
     # throughputf= os.path.join(testDir, 'GI.Throughput.1st.fits')
     suit = unittest.TestSuite()

tests/test_Straylight.py

 #
-#need add environment parameter  TEST_HOME, link to "testData/"
+#need add environment parameter  UNIT_TEST_DATA_ROOT, link to "testData/"
 #linx and mac can run as follow, need modify the name of file directory
-#export TEST_HOME=/Users/zhangxin/Work/SlitlessSim/CSST_SIM/CSST_develop/csst-simulation/tests/testData
+#export UNIT_TEST_DATA_ROOT=/Users/zhangxin/Work/SlitlessSim/CSST_SIM/CSST_develop/csst-simulation/tests/testData
 #
 import unittest
 from ObservationSim.Straylight import Straylight
@@ -71,7 +71,7 @@ class TestStraylight(unittest.TestCase):
 
     def __init__(self, methodName='runTest', filter = 'i', grating = "GI"):
         super(TestStraylight,self).__init__(methodName)
-        self.pointingData = np.loadtxt(os.path.join(os.getenv('TEST_HOME'), 'Straylight_test.dat'), dtype=np.double)
+        self.pointingData = np.loadtxt(os.path.join(os.getenv('UNIT_TEST_DATA_ROOT'), 'Straylight_test.dat'), dtype=np.double)
         self.filter = filter
         self.grating = grating
 
@@ -184,7 +184,7 @@ class TestStraylight(unittest.TestCase):
 
 
 if __name__ == '__main__':
-    os.environ['TEST_HOME']="/Users/zhangxin/Work/SlitlessSim/CSST_SIM/CSST_develop/csst-simulation/tests/testData"
+    os.environ['UNIT_TEST_DATA_ROOT']="/Users/zhangxin/Work/SlitlessSim/CSST_SIM/CSST_develop/csst-simulation/tests/testData"
 
     suit = unittest.TestSuite()
     case1 = TestStraylight('test_EarthShineFilter', filter = 'i')