LogAnalyzer: renamed test from "Underpowered" to "Thrust"

Tools/LogAnalyzer/example_output.xml

@@ -338,7 +338,7 @@
     <message></message>
   </result>
   <result>
-    <name>Underpowered</name>
+    <name>Thrust</name>
     <status>GOOD</status>
     <message></message>
   </result>

Tools/LogAnalyzer/tests/TestThrust.py

@@ -2,11 +2,11 @@ from LogAnalyzer import Test,TestResult
 import DataflashLog
 
 
-class TestUnderpowered(Test):
-	'''test for underpowered copter'''
+class TestThrust(Test):
+	'''test for sufficient thrust (copter only for now)'''
 
 	def __init__(self):
-		self.name = "Underpowered"
+		self.name = "Thrust"
 		
 	def run(self, logdata, verbose):
 		self.result = TestResult()