Use default content type when X-SSE header not set #34022

Job	Run time
Attach pull request number	6s
CI Sanity Check	31s
Initial JDK 11 Build	24m 59s
Calculate Test Jobs	14s
JVM Tests - JDK 11	47m 39s
JVM Tests - JDK 17	54m 28s
Gradle Tests - JDK ${{ matrix.java.name }}	0s
JVM Tests - JDK 20	46m 36s
JVM Tests - JDK 17 Windows	58m 42s
Devtools Tests - JDK ${{ matrix.java.name }}	0s
Kubernetes Tests - JDK ${{ matrix.java.name }}	0s
Maven Tests - JDK ${{ matrix.java.name }}	0s
Quickstarts Compilation - JDK 17	7m 28s
Native Tests - Virtual Thread - Main	8m 50s
MicroProfile TCKs Tests	13m 51s
Native Tests - Virtual Thread - Messaging	16m 6s
Native Tests - Main	14m 59s
Native Tests - Data3	11m 54s
Native Tests - Data4	10m 16s
Native Tests - Messaging1	31m 32s
Native Tests - Security2	17m 42s
Native Tests - Security3	10m 1s
Native Tests - Cache	14m 55s
Native Tests - HTTP	48m 36s
Native Tests - Misc1	10m 28s
Native Tests - Misc3	16m 15s
Native Tests - Misc4	15m 24s
Native Tests - gRPC	9m 10s
Build report	21s
	8h 11m 3s

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