Add logback.xml file for integration tests

Author: jbern0rd

src/itest/resources/logback.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<configuration>
+    <property name="LOG_LEVEL" value="${IEXEC_LOG_LEVEL:-INFO}"/>
+    <include resource="org/springframework/boot/logging/logback/base.xml"/>
+    <logger name="org.springframework.web" level="${LOG_LEVEL}"/>
+
+    <logger name="org.testcontainers" level="INFO"/>
+</configuration>