arm/oeqa/runtime/fvp_boot: move pexpect import into test method

Move the pexpect import inside the test method so that on machines without
pexpect installed we can still parse the test cases, even if this one
won't be pass.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm/lib/oeqa/runtime/cases/fvp_boot.py

@@ -1,8 +1,6 @@
 # SPDX-License-Identifier: MIT
 
 from oeqa.runtime.case import OERuntimeTestCase
-import pexpect
-
 
 class FVPBootTest(OERuntimeTestCase):
     """
@@ -11,6 +9,8 @@ class FVPBootTest(OERuntimeTestCase):
     """
 
     def test_fvp_boot(self):
+        import pexpect
+
         self.target.transition("off")
         timeout = int(self.td.get('TEST_FVP_LINUX_BOOT_TIMEOUT') or 10*60)
         self.target.transition("linux", timeout)