b=189974 Profile Switching fails after JavaScript based cert import

PSM portion of fix
r=javi sr=darin a=asa

security/manager/ssl/src/nsCrypto.cpp

@@ -1968,6 +1968,8 @@ nsCrypto::ImportUserCertificates(const nsAString& aNickname,
       CERT_ImportCAChain(derCerts, numCAs, certUsageUserCertImport);
       nsMemory::Free(derCerts);
     }
+    
+    CERT_DestroyCertList(caPubs);
   }
 
   if (aDoForcedBackup) {