(This is a merge of http://go/wvgerrit/14775)
This change causes tests that call LoadOfflineLicense() to fail if
the session is still open after that call. Due to the way that gTest
handles ASSERT_*() macros, failures in LoadOfflineLicense() will leave
the session open, causing unexpected state and cascading failures
throughout the rest of the test. With this change, we will abort
sooner, reducing log noise.
Bug: 21489628
Change-Id: Ic35bc77bbc5f676f23deeefaacd1986e383538c8
57fd014f6d