Fix mixed indentations

The code uses both spaces and tab in the same file.
According to PEP-8, use spaces only.

Change-Id: I5ac3512395ad6bd30c820ca1d549ad2acab2dc8f
Signed-off-by: Baohua Yang <baohyang@cn.ibm.com>

bddtests/steps/coverage.py

@@ -8,19 +8,19 @@
 
 
 def testCoverage():
-	#First save the coverage files
-	saveCoverageFiles("coverage","scenario_1", ["bddtests_vp0_1","bddtests_vp1_1","bddtests_vp2_1","bddtests_vp3_1",], "cov")
+    #First save the coverage files
+    saveCoverageFiles("coverage","scenario_1", ["bddtests_vp0_1","bddtests_vp1_1","bddtests_vp2_1","bddtests_vp3_1",], "cov")
 
     # Now collect the filenames for coverage files.
-	files = glob.glob(os.path.join('coverage','*.cov'))
+    files = glob.glob(os.path.join('coverage','*.cov'))
 
     #Create the aggregate coverage file
-	coverageContents = createCoverageFile(files)
+    coverageContents = createCoverageFile(files)
 
     #Ouput the aggregate coverage file
-	with open('coverage.total', 'w') as outfile:
-		outfile.write(coverageContents)
-		outfile.close()
+    with open('coverage.total', 'w') as outfile:
+        outfile.write(coverageContents)
+        outfile.close()
 
 def createCoverageAggregate():
     # Now collect the filenames for coverage files.
@@ -39,10 +39,10 @@ def saveCoverageFiles(folderName, rootName, containerNames, extension):
     'Will save the converage files to folderName'
     # Make the directory
     try:
-    	os.makedirs(folderName)
+        os.makedirs(folderName)
     except OSError as exception:
-    	if exception.errno != errno.EEXIST:
-    		raise
+        if exception.errno != errno.EEXIST:
+            raise
     for containerName in containerNames:
         srcPath = "{0}:/opt/gopath/src/github.com/hyperledger/fabric/coverage.cov".format(containerName)
         print("sourcepath = {0}".format(srcPath))
@@ -68,27 +68,27 @@ def createCoverageFile(filenames):
     #with open('coverage.total', 'w') as outfile:
     for fname in filenames:
         with open(fname) as infile:
-        	firstLine = True
-        	for line in infile:
-        		if firstLine:
-        			firstLine = False
-        			continue
-        		else:
-        		    # Split the line based upon white space
-        		    lineParts = line.split()
-            		if lineParts[0] in linesMap:
-            			# Found, keep the greater
-            			newCount = long(lineParts[2])
-            			oldCount = long(linesMap[lineParts[0]].split()[2])
-            			if newCount > oldCount:
-            				linesMap[lineParts[0]] = line
-            		else:
-            			linesMap[lineParts[0]] = line
+            firstLine = True
+            for line in infile:
+                if firstLine:
+                    firstLine = False
+                    continue
+                else:
+                    # Split the line based upon white space
+                    lineParts = line.split()
+                    if lineParts[0] in linesMap:
+                        # Found, keep the greater
+                        newCount = long(lineParts[2])
+                        oldCount = long(linesMap[lineParts[0]].split()[2])
+                        if newCount > oldCount:
+                            linesMap[lineParts[0]] = line
+                    else:
+                        linesMap[lineParts[0]] = line
     # Now sort the output
     od = OrderedDict(sorted(linesMap.items(), key=lambda i: i[1]))
 
     for (key, line) in od.items():
-    	output.write(line)
+        output.write(line)
     contents = output.getvalue()
     output.close()
     return contents