ENV: win7/x86/jre9-b153

Steps to reproduce:
1. Add "http://sqeweb.us.oracle.com/net/scanas415/export/deployment/crystal/DO_NOT_REMOVE_ME/jrebug/JawsESL/jnlp/" to ESL in JCP
2. Open JCP->Security->General settings, select "Enable enhanced security restrictions"
3. Load app: http://sqeweb.us.oracle.com/net/scanas415/export/deployment/crystal/DO_NOT_REMOVE_ME/jrebug/JawsESL/jnlp/testExpiredCASignedMFSandboxHello.jnlp
4. A security warning dialog will show up and accept it.
5. App will get loaded
6. Load the same app again
7. If app is blocked, this bug is reproduced.
Expected: app should not be blocked when cached and started again in step 6.

Affected tests:
RULE JawsESLExtraTest::testESLExpiredCASignedSandboxVHighCached any any
RULE JawsESLExtraTest::testESLExpiredCASignedSandboxVHighImported any any
RULE JawsESLExtraTest::testESLExpiredCASignedSandboxVHighImportedNeg any any