instruments: Add teardown method to clean up tempfiles

Implement the `teardown` method in instruments that utilise tempfiles
which were previously left behind.

devlib/instrument/acmecape.py

@@ -159,3 +159,7 @@ class AcmeCapeInstrument(Instrument):
 
     def get_raw(self):
         return [self.raw_data_file]
+
+    def teardown(self):
+        if os.path.isfile(self.raw_data_file):
+            os.remove(self.raw_data_file)

devlib/instrument/arm_energy_probe.py

@@ -142,3 +142,7 @@ class ArmEnergyProbeInstrument(Instrument):
 
     def get_raw(self):
         return [self.output_file_raw]
+
+    def teardown(self):
+        if os.path.isfile(self.output_file_raw):
+            os.remove(self.output_file_raw)

devlib/instrument/daq.py

@@ -14,6 +14,7 @@
 #
 
 import os
+import shutil
 import tempfile
 from itertools import chain
 
@@ -154,6 +155,8 @@ class DaqInstrument(Instrument):
 
     def teardown(self):
         self.execute('close')
+        if os.path.isdir(tempdir):
+            shutil.rmtree(tempdir)
 
     def execute(self, command, **kwargs):
         return execute_command(self.server_config, command, **kwargs)

devlib/instrument/energy_probe.py

@@ -126,3 +126,7 @@ class EnergyProbeInstrument(Instrument):
 
     def get_raw(self):
         return [self.raw_data_file]
+
+    def teardown(self):
+        if os.path.isfile(self.raw_data_file):
+            os.remove(self.raw_data_file)

devlib/instrument/frames.py

@@ -70,6 +70,11 @@ class FramesInstrument(Instrument):
     def _init_channels(self):
         raise NotImplementedError()
 
+    def teardown(self):
+        if not self.keep_raw:
+            if os.path.isfile(self._raw_file):
+                os.remove(self._raw_file)
+
 
 class GfxInfoFramesInstrument(FramesInstrument):