Make all the Travis test scripts exit in the event of error.

Test scripts that ignore errors aren't very helpful.

.travis/run-tests-cpp.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -euo pipefail
+
 if [ $GROUP == "LEXER" ]; then
     mvn -q -Dgroups="org.antlr.v4.test.runtime.category.LexerTests" -Dtest=cpp.* test 
 elif [ $GROUP == "PARSER" ]; then

.travis/run-tests-csharp.sh

@@ -1,3 +1,5 @@
 #!/bin/bash
 
+set -euo pipefail
+
 mvn -q -Dparallel=methods -DthreadCount=4 -Dtest=csharp.* test

.travis/run-tests-dotnet.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -euo pipefail
+
 # we need to build the runtime before test run, since we used "--no-dependencies"
 # when we call dotnet cli for restore and build, in order to speed up
 

.travis/run-tests-go.sh

@@ -1,3 +1,5 @@
 #!/bin/bash
 
+set -euo pipefail
+
 mvn -q -Dparallel=methods -DthreadCount=4 -Dtest=go.* test

.travis/run-tests-java.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -euo pipefail
+
 mvn -q -Dparallel=methods -DthreadCount=4 -Dtest=java.* test
 cd ../tool-testsuite
 mvn test

.travis/run-tests-javascript.sh

@@ -1,3 +1,5 @@
 #!/bin/bash
 
+set -euo pipefail
+
 mvn -q -Dparallel=methods -DthreadCount=4 -Dtest=node.* test

.travis/run-tests-python2.sh

@@ -1,3 +1,5 @@
 #!/bin/bash
 
+set -euo pipefail
+
 mvn -q -Dparallel=methods -DthreadCount=4 -Dtest=python2.* test

.travis/run-tests-python3.sh

@@ -1,3 +1,5 @@
 #!/bin/bash
 
+set -euo pipefail
+
 mvn -q -Dparallel=methods -DthreadCount=4 -Dtest=python3.* test