Fix test fails due to changes in cert generation

Test certs were originally generated with an old version of Mbed TLS
that used printableString where we now use utf8string (e.g., in the
organizationName). Otherwise the certs are identical.

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>

tests/data_files/server1.key_ext_usage.crt

@@ -1,8 +1,8 @@
 -----BEGIN CERTIFICATE-----
 MIIDVzCCAj+gAwIBAgIBATANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER
-MA8GA1UEChMIUG9sYXJTU0wxGTAXBgNVBAMTEFBvbGFyU1NMIFRlc3QgQ0EwHhcN
+MA8GA1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwHhcN
 MTEwMjEyMTQ0NDA2WhcNMjEwMjEyMTQ0NDA2WjA8MQswCQYDVQQGEwJOTDERMA8G
-A1UEChMIUG9sYXJTU0wxGjAYBgNVBAMTEVBvbGFyU1NMIFNlcnZlciAxMIIBIjAN
+A1UECgwIUG9sYXJTU0wxGjAYBgNVBAMMEVBvbGFyU1NMIFNlcnZlciAxMIIBIjAN
 BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqQIfPUBq1VVTi/027oJlLhVhXom/
 uOhFkNvuiBZS0/FDUEeWEllkh2v9K+BG+XO+3c+S4ZFb7Wagb4kpeUWA0INq1UFD
 d185fAkER4KwVzlw7aPsFRkeqDMIR8EFQqn9TMO0390GH00QUUBncxMPQPhtgSVf
@@ -11,10 +11,10 @@ lZvc/kFeF6babFtpzAK6FCwWJJxK3M3Q91Jnc/EtoCP9fvQxyi1wyokLBNsupk9w
 bp7OvViJ4lNZnm5akmXiiD8MlBmj3eXonZUT7Snbq3AS3FrKaxerUoJUsQIDAQAB
 o2UwYzAJBgNVHRMEAjAAMB0GA1UdDgQWBBQfdNY/KcF0dEU7BRIsPai9Q1kCpjAf
 BgNVHSMEGDAWgBS0WuSls97SUva51aaVD+s+vMf9/zAWBgNVHSUBAf8EDDAKBggr
-BgEFBQcDATANBgkqhkiG9w0BAQUFAAOCAQEAloyGLaLVS/Ce+q08AkCcqn+/ymu3
-l25lMU99gW7MPccDuNoy83ZveJ654/ZEcswR0sc3T/BPShf0Hx8Ze3p0VvLjcRK8
-HME4GCRONnkuXhi784jkoxCU4N6NczcnDF8YOXdrCuosyS48dSrCpj/ouPxhFg2O
-tjDkoZZqA0G0oWXn0d7nzSELLXatsUh52vsrlpu2UhnmCHjv8OOZYPa0agUUFmzm
-gJ3Of7uK1w+WwBUyQbkQJvPpIT2MwMs8SBZZOZH/jluSn+4GfULAuRDbWaTj8VsN
-g7WVjskm5kRQaGwi7ez4ajAJUzHQExUwt62ciFSETn6EYtw4f2EsyIgNXA==
+BgEFBQcDATANBgkqhkiG9w0BAQUFAAOCAQEAegtCN4EObE69RjW1hKUEQ/InrIsf
+poKIgJCh3sck+FYKjcsMhRPBztnZaqjvkLnmCcq0Yv7uUDThHsNuu+NbeVr4flZL
+gUoSSdHXYrJ8qDYez6oGoxttoZ33sqD3LQfzWZhDoTyjGUHTiWaA6KidCsWzkhKY
+aNXF7O8dHO7k06I2UWt7SKbBm1dPj8OM4285kkQ7KCpG27ABtHePkp9aG66O/ktD
+GbZs0AaYpeVnB9v1vSp6xInDCWydDFbmEE0mzAQr285UU07QEpnU1W/2qZHfLxnQ
+GiDpR5pxoKXkskj2VuHPZPqbIkv9v2+bjeyXHDRSL7Rj087xhD5uXKb9fw==
 -----END CERTIFICATE-----

tests/data_files/server1.key_ext_usages.crt

@@ -1,8 +1,8 @@
 -----BEGIN CERTIFICATE-----
 MIIDYTCCAkmgAwIBAgIBATANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER
-MA8GA1UEChMIUG9sYXJTU0wxGTAXBgNVBAMTEFBvbGFyU1NMIFRlc3QgQ0EwHhcN
+MA8GA1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwHhcN
 MTEwMjEyMTQ0NDA2WhcNMjEwMjEyMTQ0NDA2WjA8MQswCQYDVQQGEwJOTDERMA8G
-A1UEChMIUG9sYXJTU0wxGjAYBgNVBAMTEVBvbGFyU1NMIFNlcnZlciAxMIIBIjAN
+A1UECgwIUG9sYXJTU0wxGjAYBgNVBAMMEVBvbGFyU1NMIFNlcnZlciAxMIIBIjAN
 BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqQIfPUBq1VVTi/027oJlLhVhXom/
 uOhFkNvuiBZS0/FDUEeWEllkh2v9K+BG+XO+3c+S4ZFb7Wagb4kpeUWA0INq1UFD
 d185fAkER4KwVzlw7aPsFRkeqDMIR8EFQqn9TMO0390GH00QUUBncxMPQPhtgSVf
@@ -11,11 +11,11 @@ lZvc/kFeF6babFtpzAK6FCwWJJxK3M3Q91Jnc/EtoCP9fvQxyi1wyokLBNsupk9w
 bp7OvViJ4lNZnm5akmXiiD8MlBmj3eXonZUT7Snbq3AS3FrKaxerUoJUsQIDAQAB
 o28wbTAJBgNVHRMEAjAAMB0GA1UdDgQWBBQfdNY/KcF0dEU7BRIsPai9Q1kCpjAf
 BgNVHSMEGDAWgBS0WuSls97SUva51aaVD+s+vMf9/zAgBgNVHSUBAf8EFjAUBggr
-BgEFBQcDAwYIKwYBBQUHAwgwDQYJKoZIhvcNAQEFBQADggEBAAy0NlGQTgb9VSq9
-cAcetc1dQlnkMLGg9iBYSvwZ3n1AAd484zmfj062mavixlEKyiGfh8qYZDLLi4Ne
-oXVuaBiz7X0XRhnj4Lsm+s4dO8rTzktvmbXE3J1ahW16hqZEj+mjbckyr5GfZZOq
-aoX2DqxPwO0Glg5X879vWZQ7iUUrI38cMX869xLgBJRl1zC1KyWeeXG3QduT1LZY
-sJI/OxpkA/vDP6rFDD3YjgUmQ9vpil2YD9gyb6eMVuTbChZh/7T9T4/zgkc1KIFt
-LLpXRUQQDGI/7TTwoT26M7xryoj0S2RlxW/VJz5KrBRaQYyaMDmE7scePqIaFNc+
-siqNj9s=
+BgEFBQcDAwYIKwYBBQUHAwgwDQYJKoZIhvcNAQEFBQADggEBADIT9M10vT5yzMSR
+GaaImXjyTRIBK683Vxnq5jqAJ75KzNUC52aiCOfd9/hAMkq3Pj+r6tIsH+jsl5PL
+E4iv8GVDlbjA57icTD30XbolL4YPUvZYclxVopfRhTiDa5KJ1lYkUwWAE/Glj66Q
+WO7Hihl+GYXap2e7dBZ7hGHdv6J1gRfA1OW6iB23Wl4xb0Y1CGc16yJZwuFbtbwM
+w8z8a0XNd2UQTYesYlIvVpVcx2atgkbZwehPWGNCLGngz60fultj7JdLuUHi+r0z
+DtjbSPsHDZDAer6ZxjaA4hkcnppacFttC+deD8bQ8+2JjHF6Gb/MBnaYIbOZOBgC
+8CPIBjk=
 -----END CERTIFICATE-----