Signature_algorithms extension configuration and parsing logic are inconsistent

[huiyuexu]

Issue Type: Tool Configuration

Testcase name: signature_algorithms extension

Testcase number: TLS_B1_GP_03_T

Test code: TLS_B1_GP_03_T.java

Description:
In TestRunPlan mode and TLS 1.2 tested, only reserverd_4 can be configured in the XML file to configure algorithm as rsa_pss_rsae_sha256. Otherwise, the tool cannot send expected packets carrying rsa_pss_rsae_sha256 algorithm.

However, when parsing the received packets, the parsed result is rsa_pss_rsae_sha256 (as expected), which is different from reserverd_4 configured in the XML file. As a result, the test case is failed.