tests: rework device tests to checkout just device_tests subdirectory from python-trezor repo

Makefile

@@ -45,7 +45,7 @@ test: ## run unit tests
 	cd tests ; ./run_tests.sh
 
 testpy: ## run selected unit tests from python-trezor
-	cd tests ; ./run_tests_python_trezor.sh
+	cd tests ; ./run_tests_device.sh
 
 pylint: ## run pylint on application sources
 	pylint -E $(shell find src -name *.py)

tests/.gitignore

@@ -1 +1 @@
-python-trezor/
+device_tests/

tests/run_tests_device.sh

@@ -1,9 +1,7 @@
 #!/bin/bash
 
-if [ -d python-trezor ]; then
-    cd python-trezor ; git pull ; cd ..
-else
-    git clone https://github.com/trezor/python-trezor.git
+if [ \! -d device_tests ]; then
+    curl -s -L https://github.com/trezor/python-trezor/archive/master.tar.gz | tar -xvz --strip-components=2 python-trezor-master/tests/device_tests
 fi
 
 # run emulator
@@ -14,7 +12,7 @@ UPY_PID=$!
 
 sleep 1
 
-cd ../tests/python-trezor/tests/device_tests
+cd ../tests/device_tests
 
 error=0