Setenv value may be enclosed in curly braces on EnvironmentModules

Starting Environment Modules 4.2, value of setenv statement in "module
show" output is enclosed in curly braces if it contains spaces.

This change helps to pass "test_get_setenv_value_from_modulefile" test
with Environment Modules v4.2+

easybuild/tools/modules.py

@@ -1358,6 +1358,27 @@ def check_module_output(self, cmd, stdout, stderr):
         else:
             self.log.debug("No errors detected when running module command '%s'", cmd)
 
+    def get_setenv_value_from_modulefile(self, mod_name, var_name):
+        """
+        Get value for specific 'setenv' statement from module file for the specified module.
+
+        :param mod_name: module name
+        :param var_name: name of the variable being set for which value should be returned
+        """
+        # Tcl-based module tools produce "module show" output with setenv statements like:
+        # "setenv		 GCC_PATH /opt/gcc/8.3.0"
+        # "setenv		 VAR {some text}
+        # - line starts with 'setenv'
+        # - whitespace (spaces & tabs) around variable name
+        # - curly braces around value if it contain spaces
+        value = super(EnvironmentModules, self).get_setenv_value_from_modulefile(mod_name=mod_name,
+                                                                                 var_name=var_name)
+
+        if value:
+            value = value.strip('{}')
+
+        return value
+
 
 class Lmod(ModulesTool):
     """Interface to Lmod."""