[TESTBUG] TestECDH.java and TestECDSA.java fail on multiple Linux platforms

The following PKCS11 tests fail on Ubuntu 15.10 (have since been tested on other Linux flavors, and have been proven to fail on some of those too):

sun/security/pkcs11/ec/TestECDH.java
sun/security/pkcs11/ec/TestECDSA.java

The tests fail with exceptions like the following:

java.security.spec.InvalidKeySpecException: Could not create EC public key
at sun.security.pkcs11.P11ECKeyFactory.engineGeneratePublic(P11ECKeyFactory.java:173)
at java.security.KeyFactory.generatePublic(KeyFactory.java:328)
at TestECDH.test(TestECDH.java:94)
at TestECDH.main(TestECDH.java:86)
at PKCS11Test.premain(PKCS11Test.java:86)
at PKCS11Test.testNSS(PKCS11Test.java:401)
at PKCS11Test.main(PKCS11Test.java:96)
at TestECDH.main(TestECDH.java:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:92)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.security.InvalidKeyException: Could not create EC public key
at sun.security.pkcs11.P11ECKeyFactory.implTranslatePublicKey(P11ECKeyFactory.java:130)
at sun.security.pkcs11.P11ECKeyFactory.engineGeneratePublic(P11ECKeyFactory.java:171)
... 13 more
Caused by: sun.security.pkcs11.wrapper.PKCS11Exception: CKR_DOMAIN_PARAMS_INVALID
at sun.security.pkcs11.wrapper.PKCS11.C_CreateObject(Native Method)
at sun.security.pkcs11.P11ECKeyFactory.generatePublic(P11ECKeyFactory.java:254)
at sun.security.pkcs11.P11ECKeyFactory.implTranslatePublicKey(P11ECKeyFactory.java:110)
... 14 more