fix command not found in install.sh

[hzliangbin]

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• Docs
• Inject Sidecar
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1. fix error in install.sh, it will result in error if awk print { } included /bin/bash.
2. log volumeMounts mismatch logs.

[hzliangbin]

@chuntaojun gentle ping.

[chuntaojun]

LGTM