Fix missing SHA1PRNG bean definition in WebSecurityConfig

Author: arteymix

src/main/java/ubc/pavlab/rdp/WebSecurityConfig.java

@@ -108,6 +108,6 @@ protected void configure( HttpSecurity http ) throws Exception {
 
     @Bean
     public SecureRandom secureRandom() throws NoSuchAlgorithmException {
-        return SecureRandom.getInstanceStrong();
+        return SecureRandom.getInstance( "SHA1PRNG" );
     }
 }