Do not clobber initialize method

There was a method named initialize defined and implemented
differently in the dracut modules kiwi-lib and kiwi-repart.
kiwi-lib is expected to be shared code across all kiwi dracut
modules. However if one module redefines a method of the
same name which is used in another module and expected to
work differently there, this is evil. This commit cleans
up the name conflict and names the kiwi library init function
as lib_initialize. All dracut code that is expected to make
use of this method has been adopted too.

Author: schaefi

dracut/modules.d/90kiwi-dump/kiwi-dump-image.sh

@@ -513,7 +513,7 @@ function get_remote_image_source_files {
 #--------------------------------------
 setup_debug
 
-initialize
+lib_initialize
 
 udev_pending
 

dracut/modules.d/99kiwi-dump-reboot/kiwi-dump-reboot-system.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-type initialize >/dev/null 2>&1 || . /lib/kiwi-lib.sh
+type lib_initialize >/dev/null 2>&1 || . /lib/kiwi-lib.sh
 type report_and_quit >/dev/null 2>&1 || . /lib/kiwi-dump-image.sh
 type get_selected_disk >/dev/null 2>&1 || . /lib/kiwi-dump-image.sh
 type run_dialog >/dev/null 2>&1 || . /lib/kiwi-dialog-lib.sh
@@ -73,7 +73,7 @@ function boot_installed_system {
 #======================================
 # Reboot into system
 #--------------------------------------
-initialize
+lib_initialize
 
 if getargbool 0 rd.kiwi.ramdisk; then
     # For ramdisk deployment a kexec boot is not possible as it

dracut/modules.d/99kiwi-lib/kiwi-lib.sh

@@ -203,7 +203,7 @@ function bool {
     fi
 }
 
-function initialize {
+function lib_initialize {
     # """
     # Source profile variables into runtime environment
     # The method will exit from the initrd if the profile