Add tests to update to specific commit and latest

This also tests garbage collecting of obsolete repos and also changed repo URLs

Author: screamerbg

circle.yml

@@ -3,8 +3,14 @@ test:
         - py.test test
         - cd ../tests && mbed new new-test
         - cd ../tests && mbed import https://github.com/ARMmbed/mbed-Client-example-temp git-test
+        - cd ../tests/git-test && mbed update 2d9404a4f88db7de0e5a9ea2acdbca1aeacab9c4 --clean
+        - cd ../tests/git-test && mbed update master --clean
         - cd ../tests && mbed import https://developer.mbed.org/teams/Morpheus/code/mbed-Client-Morpheus-hg hg-test
+        - cd ../tests/hg-test && mbed update b02527cafcde8612ff051fea57e9975aca598807 --clean
+        - cd ../tests/hg-test && mbed update --clean
         - cd ../tests && mbed import https://developer.mbed.org/users/samux/code/USBSerial_HelloWorld bld-test
+        - cd ../tests/bld-test/mbed && mbed update 95 --clean
+        - cd ../tests/bld-test && mbed update --clean
 
 dependencies:
     pre: