Move some metadata to Java 21.

Author: khatchad

com.ibm.wala.cast.python.jython.test/META-INF/MANIFEST.MF

@@ -5,7 +5,7 @@ Bundle-SymbolicName: com.ibm.wala.cast.python.test
 Bundle-Version: 1.0.0.qualifier
 Export-Package: com.ibm.wala.cast.python.jython.test
 Bundle-Vendor: IBM
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Require-Bundle: com.ibm.wala.cast.python;bundle-version="0.0.1",
  org.junit;bundle-version="4.12.0"
 Automatic-Module-Name: com.ibm.wala.cast.python.test

com.ibm.wala.cast.python.jython3.test/META-INF/MANIFEST.MF

@@ -5,7 +5,7 @@ Bundle-SymbolicName: com.ibm.wala.cast.python.test
 Bundle-Version: 1.0.0.qualifier
 Export-Package: com.ibm.wala.cast.python.jython3.test
 Bundle-Vendor: IBM
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Require-Bundle: com.ibm.wala.cast.python;bundle-version="0.0.1",
  org.junit;bundle-version="4.12.0"
 Automatic-Module-Name: com.ibm.wala.cast.python.test

com.ibm.wala.cast.python.jython3/META-INF/MANIFEST.MF

@@ -10,5 +10,5 @@ Export-Package: com.ibm.wala.cast.python.client,
  com.ibm.wala.cast.python.util,
  org.python.antlr
 Bundle-Vendor: IBM
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Automatic-Module-Name: com.ibm.wala.cast.python

com.ibm.wala.cast.python.test/META-INF/MANIFEST.MF

@@ -4,6 +4,6 @@ Bundle-Name: WALA CAst Python Tests
 Bundle-SymbolicName: com.ibm.wala.cast.python.test
 Bundle-Version: 1.0.0.qualifier
 Bundle-Vendor: IBM
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Automatic-Module-Name: com.ibm.wala.cast.python.test
 Export-Package: com.ibm.wala.cast.python.test

com.ibm.wala.cast.python/META-INF/MANIFEST.MF

@@ -17,5 +17,5 @@ Export-Package: com.ibm.wala.cast.python.analysis.ap,
  com.ibm.wala.cast.python.types,
  com.ibm.wala.cast.python.util
 Bundle-Vendor: IBM
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Automatic-Module-Name: com.ibm.wala.cast.python