IMP: add multiple Improvements

* add new kernel module detection (enable & listing)  with detection of monolithic kernel
* change way to detect if file system type is disabled
* add global IS_CONTAINER variable
* disable test for 3.4.x to be consistent with others
* add cli options to override configuration loglevel

lib/common.sh

@@ -113,11 +113,36 @@ sudo_wrapper() {
     fi
 }
 
+#
+# detect if container based on cgroup detection
+#
+is_running_in_container() {
+    awk -F/ '$2 == "'"$1"'"' /proc/self/cgroup
+}
+
+CONTAINER_TYPE=""
+IS_CONTAINER=0
+
+if [ "$(is_running_in_container "docker")" != "" ]; then
+    CONTAINER_TYPE="docker"
+    IS_CONTAINER=1
+fi
+if [ "$(is_running_in_container "lxc")" != "" ]; then
+    CONTAINER_TYPE="lxc"
+    IS_CONTAINER=1
+fi
+if [ "$(is_running_in_container "kubepods")" != "" ]; then
+    # shellcheck disable=SC2034
+    CONTAINER_TYPE="kubepods"
+    # shellcheck disable=SC2034
+    IS_CONTAINER=1
+fi
+
 #
 # Math functions
 #
 
-function div() {
+div() {
     local _d=${3:-2}
     local _n=0000000000
     _n=${_n:0:$_d}