Adapt buffering test to new ticket size

The size of the ticket used in this test dropped from 192 to 143 bytes, so
move all sizes used in this test down 50 bytes. Also, we now need to adapt the
server response size as the default size would otherwise collide with the new
mtu value.
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 72e7c3e..95d7336 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -702,7 +702,7 @@
 
 component_test_small_mbedtls_ssl_dtls_max_buffering () {
     msg "build: small MBEDTLS_SSL_DTLS_MAX_BUFFERING #1"
-    scripts/config.pl set MBEDTLS_SSL_DTLS_MAX_BUFFERING 240
+    scripts/config.pl set MBEDTLS_SSL_DTLS_MAX_BUFFERING 190
     CC=gcc cmake -D CMAKE_BUILD_TYPE:String=Asan .
     make
 
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index d6683b4..da89642 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -7711,11 +7711,11 @@
 #   without fragmentation or be reassembled within the bounds of
 #   MBEDTLS_SSL_DTLS_MAX_BUFFERING. Achieve this by testing with a PSK-based
 #   handshake, omitting CRTs.
-requires_config_value_at_least "MBEDTLS_SSL_DTLS_MAX_BUFFERING" 240
-requires_config_value_at_most "MBEDTLS_SSL_DTLS_MAX_BUFFERING" 280
+requires_config_value_at_least "MBEDTLS_SSL_DTLS_MAX_BUFFERING" 190
+requires_config_value_at_most "MBEDTLS_SSL_DTLS_MAX_BUFFERING" 230
 run_test    "DTLS reordering: Buffer encrypted Finished message, drop for fragmented NewSessionTicket" \
             -p "$P_PXY delay_srv=NewSessionTicket delay_srv=NewSessionTicket delay_ccs=1" \
-            "$P_SRV mtu=190 dgram_packing=0 psk=abc123 psk_identity=foo cookies=0 dtls=1 debug_level=2" \
+            "$P_SRV mtu=140 response_size=90 dgram_packing=0 psk=abc123 psk_identity=foo cookies=0 dtls=1 debug_level=2" \
             "$P_CLI dgram_packing=0 dtls=1 debug_level=2 force_ciphersuite=TLS-PSK-WITH-AES-128-CCM-8 psk=abc123 psk_identity=foo" \
             0 \
             -s "Buffer record from epoch 1" \